diff --git a/.github/workflows/architecture-quality.yml b/.github/workflows/architecture-quality.yml
new file mode 100644
index 0000000..ada851d
--- /dev/null
+++ b/.github/workflows/architecture-quality.yml
@@ -0,0 +1,51 @@
+name: Architecture and changed-file quality
+
+on:
+  pull_request:
+    branches: [main, dev]
+
+permissions:
+  contents: read
+
+jobs:
+  architecture:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Set up .NET
+        uses: actions/setup-dotnet@v4
+        with:
+          dotnet-version: "8.0.x"
+
+      - name: Restore
+        run: dotnet restore SeaHavenIndustries.sln
+
+      - name: Verify architecture boundaries
+        run: >-
+          dotnet test
+          Api.SeaHavenIndustries.Tests/Api.SeaHavenIndustries.Tests.csproj
+          --no-restore
+          --filter FullyQualifiedName~ArchitectureTests
+
+      - name: Verify formatting of changed C# files
+        shell: bash
+        run: |
+          mapfile -t files < <(
+            git diff --name-only --diff-filter=ACMR \
+              "${{ github.event.pull_request.base.sha }}" \
+              "${{ github.event.pull_request.head.sha }}" \
+              -- '*.cs'
+          )
+
+          if (( ${#files[@]} == 0 )); then
+            exit 0
+          fi
+
+          dotnet format SeaHavenIndustries.sln \
+            --no-restore \
+            --verify-no-changes \
+            --include "${files[@]}"
diff --git a/Api.SeaHavenIndustries.Tests/ArchitectureTests.cs b/Api.SeaHavenIndustries.Tests/ArchitectureTests.cs
new file mode 100644
index 0000000..b636e67
--- /dev/null
+++ b/Api.SeaHavenIndustries.Tests/ArchitectureTests.cs
@@ -0,0 +1,76 @@
+using System.Reflection;
+using Api.SeaHavenIndustries.Controllers;
+using Data.SeaHavenIndustries;
+using FluentAssertions;
+using Microsoft.AspNetCore.Mvc;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.Extensions.Configuration;
+using SeaHaven.DataServices.Implementation;
+using SeaHaven.Services.Implementation;
+using Xunit;
+
+namespace Api.SeaHavenIndustries.Tests;
+
+public class ArchitectureTests
+{
+    private static readonly Assembly ApiAssembly = typeof(VendorPortalController).Assembly;
+    private static readonly Assembly ServicesAssembly = typeof(VendorService).Assembly;
+    private static readonly Assembly DataServicesAssembly = typeof(VendorDataService).Assembly;
+
+    private const string ServiceImplementationNamespace = "SeaHaven.Services.Implementation";
+    private const string DataServiceImplementationNamespace = "SeaHaven.DataServices.Implementation";
+
+    private static IEnumerable<Type> ApiControllers =>
+        ApiAssembly.GetTypes()
+            .Where(t => t.IsClass && !t.IsAbstract && typeof(ControllerBase).IsAssignableFrom(t));
+
+    private static IEnumerable<Type> BusinessServiceImplementations =>
+        ServicesAssembly.GetTypes()
+            .Where(t => t.IsClass && !t.IsAbstract && !t.IsGenericType)
+            .Where(t => t.GetInterfaces().Any(i => i.Name == "I" + t.Name));
+
+    private static bool IsConcrete(Type type) => type.IsClass && !type.IsAbstract && !type.IsInterface;
+
+    private static bool IsDbContext(Type type) => typeof(DbContext).IsAssignableFrom(type);
+
+    private static bool IsConcreteServiceImplementation(Type type) =>
+        type.Namespace == ServiceImplementationNamespace && IsConcrete(type);
+
+    private static bool IsConcreteDataService(Type type) =>
+        type.Namespace == DataServiceImplementationNamespace && IsConcrete(type);
+
+    private static IEnumerable<ParameterInfo> ParametersOf(IEnumerable<Type> types) =>
+        types.SelectMany(t => t.GetConstructors().SelectMany(c => c.GetParameters()));
+
+    [Fact]
+    public void Controllers_DoNotInject_DbContext_ConcreteDataServices_Or_ConcreteServiceImplementations()
+    {
+        ApiControllers.Should().NotBeEmpty("the API must expose controllers for this invariant to be meaningful");
+
+        var violations = ParametersOf(ApiControllers)
+            .Where(p => IsDbContext(p.ParameterType)
+                        || IsConcreteDataService(p.ParameterType)
+                        || IsConcreteServiceImplementation(p.ParameterType))
+            .Select(p => $"{p.Member.DeclaringType!.Name} depends on {p.ParameterType.FullName} ({p.Name})")
+            .ToList();
+
+        violations.Should().BeEmpty(
+            "controllers must depend only on interfaces/abstractions, never on DbContext, concrete data services, or concrete service implementations");
+    }
+
+    [Fact]
+    public void BusinessServices_DoNotInject_DbContext_Or_IConfiguration()
+    {
+        BusinessServiceImplementations.Should().NotBeEmpty(
+            "business services must be discovered for this invariant to be meaningful");
+
+        var violations = ParametersOf(BusinessServiceImplementations)
+            .Where(p => IsDbContext(p.ParameterType)
+                        || typeof(IConfiguration).IsAssignableFrom(p.ParameterType))
+            .Select(p => $"{p.Member.DeclaringType!.Name} depends on {p.ParameterType.FullName} ({p.Name})")
+            .ToList();
+
+        violations.Should().BeEmpty(
+            "business services must depend on data-service interfaces and typed options, never on DbContext or IConfiguration");
+    }
+}
diff --git a/Api.SeaHavenIndustries.Tests/AuthenticationServiceTests.cs b/Api.SeaHavenIndustries.Tests/AuthenticationServiceTests.cs
index f233055..71b592b 100644
--- a/Api.SeaHavenIndustries.Tests/AuthenticationServiceTests.cs
+++ b/Api.SeaHavenIndustries.Tests/AuthenticationServiceTests.cs
@@ -1,9 +1,10 @@
 using Data.SeaHavenIndustries;
 using FluentAssertions;
 using Microsoft.AspNetCore.Identity;
-using Microsoft.Extensions.Configuration;
+using Microsoft.Extensions.Options;
 using Moq;
 using SeaHaven.DataServices.Interfaces;
+using SeaHaven.Services.Configuration;
 using SeaHaven.Services.DTOs;
 using SeaHaven.Services.Implementation;
 using SeaHaven.Services.Interfaces;
@@ -24,17 +25,15 @@ public class AuthenticationServiceTests
         var (manager, s, h) = IdentityTestHelpers.CreateUserManager();
         store = s;
         hasher = h;
-        return new AuthenticationService(manager, Config(), userData.Object, forget.Object, email.Object);
+        return new AuthenticationService(manager, Options.Create(JwtOptions), userData.Object, forget.Object, email.Object);
     }
 
-    private static IConfiguration Config() => new ConfigurationBuilder()
-        .AddInMemoryCollection(new Dictionary<string, string?>
-        {
-            ["JWT:Secret"] = new string('x', 64),
-            ["JWT:ValidIssuer"] = "issuer",
-            ["JWT:ValidAudience"] = "audience"
-        })
-        .Build();
+    private static JwtOptions JwtOptions => new()
+    {
+        Secret = new string('x', 64),
+        ValidIssuer = "issuer",
+        ValidAudience = "audience"
+    };
 
     [Fact]
     public async Task Login_UnknownUser_ReturnsNull()
diff --git a/Api.SeaHavenIndustries.Tests/DispatchBatchingBehaviorTests.cs b/Api.SeaHavenIndustries.Tests/DispatchBatchingBehaviorTests.cs
new file mode 100644
index 0000000..8992315
--- /dev/null
+++ b/Api.SeaHavenIndustries.Tests/DispatchBatchingBehaviorTests.cs
@@ -0,0 +1,199 @@
+using Data.SeaHavenIndustries;
+using FluentAssertions;
+using Microsoft.Extensions.Options;
+using Moq;
+using SeaHaven.DataServices.Interfaces;
+using SeaHaven.DataServices.Models;
+using SeaHaven.Services.Configuration;
+using SeaHaven.Services.DTOs;
+using SeaHaven.Services.Implementation;
+using SeaHaven.Services.Interfaces;
+using Xunit;
+
+namespace Api.SeaHavenIndustries.Tests;
+
+public class DispatchBatchingBehaviorTests
+{
+    private static WorkOrderDispatchService BuildService(
+        Mock<IWorkOrderDataService>? woData = null,
+        Mock<IVendorDataService>? vendorData = null,
+        Mock<ITaskListTemplateDataService>? templateData = null,
+        Mock<IDispatchDataService>? dispatchData = null)
+    {
+        var dd = dispatchData ?? new Mock<IDispatchDataService>();
+        dd.Setup(d => d.GenerateNextPONumberAsync()).ReturnsAsync("1");
+        dd.Setup(d => d.GenerateNextDispatchNumberAsync()).ReturnsAsync("DSP-1");
+        dd.Setup(d => d.AddAsync(It.IsAny<Dispatch>()))
+            .ReturnsAsync((Dispatch d) => d);
+
+        var emailPort = new Mock<IDispatchEmailPort>();
+        emailPort.Setup(e => e.SendDispatchEmailAsync(It.IsAny<string>(), It.IsAny<string>(), It.IsAny<string>(), It.IsAny<string>()))
+            .ReturnsAsync(true);
+
+        var tokenPort = new Mock<IVendorTokenPort>();
+        tokenPort.Setup(t => t.GetOrCreateActiveTokenAsync(It.IsAny<int>())).ReturnsAsync("token");
+
+        return new WorkOrderDispatchService(
+            (woData ?? new Mock<IWorkOrderDataService>()).Object,
+            dd.Object,
+            (vendorData ?? new Mock<IVendorDataService>()).Object,
+            Mock.Of<IUserDataService>(),
+            (templateData ?? new Mock<ITaskListTemplateDataService>()).Object,
+            Mock.Of<ICommentDataService>(),
+            emailPort.Object,
+            tokenPort.Object,
+            Options.Create(new FrontendOptions()));
+    }
+
+    private static Mock<IWorkOrderDataService> WorkOrderDataReturning(params WorkOrder[] workOrders) =>
+        WorkOrderDataReturning(new Mock<IWorkOrderDataService>(), workOrders);
+
+    private static Mock<IWorkOrderDataService> WorkOrderDataReturning(Mock<IWorkOrderDataService> mock, params WorkOrder[] workOrders)
+    {
+        mock.Setup(d => d.GetByRequestedIdsWithDetailsAsync(
+                It.IsAny<IReadOnlyCollection<int>>(),
+                It.IsAny<CancellationToken>()))
+            .ReturnsAsync(workOrders.ToList());
+        return mock;
+    }
+
+    private static Mock<IVendorDataService> VendorDataReturning(params Vendor[] vendors)
+    {
+        var mock = new Mock<IVendorDataService>();
+        mock.Setup(d => d.GetByIdsOrderedAsync(It.IsAny<IReadOnlyCollection<int>>(), It.IsAny<CancellationToken>()))
+            .ReturnsAsync(vendors.ToList());
+        return mock;
+    }
+
+    [Fact]
+    public async Task Dispatch_PrimaryWorkOrderFollowsReturnedOrder()
+    {
+        var woData = WorkOrderDataReturning(
+            new WorkOrder { Id = 30, InternalWONumber = "WO-30" },
+            new WorkOrder { Id = 10, InternalWONumber = "WO-10" });
+        var dispatchData = new Mock<IDispatchDataService>();
+        var service = BuildService(woData, VendorDataReturning(new Vendor { Id = 1, CompanyName = "V", Email = "v@x.io" }), dispatchData: dispatchData);
+
+        Dispatch? saved = null;
+        dispatchData.Setup(d => d.AddAsync(It.IsAny<Dispatch>()))
+            .ReturnsAsync((Dispatch d) => { saved = d; return d; });
+
+        await service.DispatchToVendorAsync(new DispatchToVendorInput
+        {
+            WorkOrderIds = new() { 30, 10 },
+            VendorIds = new() { 1 }
+        });
+
+        saved.Should().NotBeNull();
+        saved!.WorkOrderId.Should().Be(30);
+    }
+
+    [Fact]
+    public async Task Dispatch_DeduplicatesVendorsAndSkipsMissing()
+    {
+        var woData = WorkOrderDataReturning(new WorkOrder { Id = 10, InternalWONumber = "WO-10" });
+        var vendorData = new Mock<IVendorDataService>();
+        vendorData.Setup(d => d.GetByIdsOrderedAsync(It.IsAny<IReadOnlyCollection<int>>(), It.IsAny<CancellationToken>()))
+            .ReturnsAsync(new List<Vendor> { new() { Id = 2, CompanyName = "Only Co", Email = "v@x.io" } });
+
+        var service = BuildService(woData, vendorData);
+
+        var result = await service.DispatchToVendorAsync(new DispatchToVendorInput
+        {
+            WorkOrderIds = new() { 10 },
+            VendorIds = new() { 2, 2, 999 }
+        });
+
+        result.Dispatches.Should().HaveCount(1);
+        result.Dispatches.Single().VendorName.Should().Be("Only Co");
+        vendorData.Verify(d => d.GetByIdsOrderedAsync(
+            It.Is<IReadOnlyCollection<int>>(ids => ids.SequenceEqual(new[] { 2, 999 })),
+            It.IsAny<CancellationToken>()), Times.Once);
+        vendorData.Verify(d => d.GetByIdAsync(It.IsAny<int>()), Times.Never);
+    }
+
+    [Fact]
+    public async Task Dispatch_FetchesTemplateOnceRegardlessOfVendorCount()
+    {
+        var woData = WorkOrderDataReturning(new WorkOrder { Id = 10, InternalWONumber = "WO-10" });
+        var templateData = new Mock<ITaskListTemplateDataService>();
+        templateData.Setup(d => d.GetByIdWithItemsAsync(7))
+            .ReturnsAsync(new TaskListTemplate
+            {
+                Items = new List<TaskListTemplateItem>
+                {
+                    new() { ItemText = "A", SortOrder = 0 },
+                    new() { ItemText = "B", SortOrder = 1 }
+                }
+            });
+        var vendorData = VendorDataReturning(
+            new Vendor { Id = 1, CompanyName = "V1", Email = "a@x.io" },
+            new Vendor { Id = 2, CompanyName = "V2", Email = "b@x.io" });
+
+        var service = BuildService(woData, vendorData, templateData);
+
+        await service.DispatchToVendorAsync(new DispatchToVendorInput
+        {
+            WorkOrderIds = new() { 10 },
+            VendorIds = new() { 1, 2 },
+            TaskListTemplateId = 7
+        });
+
+        templateData.Verify(d => d.GetByIdWithItemsAsync(7), Times.Once);
+    }
+
+    [Fact]
+    public async Task Dispatch_PerformsSingleBatchedVendorLookup()
+    {
+        var woData = WorkOrderDataReturning(new WorkOrder { Id = 10, InternalWONumber = "WO-10" });
+        var vendorData = VendorDataReturning(new Vendor { Id = 1, CompanyName = "V1", Email = "a@x.io" });
+
+        var service = BuildService(woData, vendorData);
+
+        await service.DispatchToVendorAsync(new DispatchToVendorInput
+        {
+            WorkOrderIds = new() { 10 },
+            VendorIds = new() { 1, 2, 3 }
+        });
+
+        vendorData.Verify(d => d.GetByIdsOrderedAsync(It.IsAny<IReadOnlyCollection<int>>(), It.IsAny<CancellationToken>()), Times.Once);
+        vendorData.Verify(d => d.GetByIdAsync(It.IsAny<int>()), Times.Never);
+    }
+
+    [Fact]
+    public async Task Dispatch_BatchesAuditLogsOncePerVendorAndNeverSingles()
+    {
+        var woData = WorkOrderDataReturning(
+            new WorkOrder { Id = 10, InternalWONumber = "WO-10" },
+            new WorkOrder { Id = 11, InternalWONumber = "WO-11" });
+        var vendorData = VendorDataReturning(
+            new Vendor { Id = 1, CompanyName = "V1", Email = "a@x.io" },
+            new Vendor { Id = 2, CompanyName = "V2", Email = "b@x.io" });
+
+        var service = BuildService(woData, vendorData);
+
+        await service.DispatchToVendorAsync(new DispatchToVendorInput
+        {
+            WorkOrderIds = new() { 10, 11 },
+            VendorIds = new() { 1, 2 }
+        });
+
+        woData.Verify(d => d.AddAuditLogsAsync(It.Is<IReadOnlyCollection<WorkOrderAuditLog>>(logs => logs.Count == 2)), Times.Exactly(2));
+        woData.Verify(d => d.AddAuditLogAsync(It.IsAny<WorkOrderAuditLog>()), Times.Never);
+    }
+
+    [Fact]
+    public async Task Dispatch_NoWorkOrders_Throws()
+    {
+        var woData = WorkOrderDataReturning();
+        var service = BuildService(woData, VendorDataReturning());
+
+        var act = () => service.DispatchToVendorAsync(new DispatchToVendorInput
+        {
+            WorkOrderIds = new() { 404 },
+            VendorIds = new() { 1 }
+        });
+
+        await act.Should().ThrowAsync<InvalidOperationException>();
+    }
+}
diff --git a/Api.SeaHavenIndustries.Tests/ServiceBehaviorTests.cs b/Api.SeaHavenIndustries.Tests/ServiceBehaviorTests.cs
index c786e8f..1c84083 100644
--- a/Api.SeaHavenIndustries.Tests/ServiceBehaviorTests.cs
+++ b/Api.SeaHavenIndustries.Tests/ServiceBehaviorTests.cs
@@ -1,8 +1,9 @@
 using Data.SeaHavenIndustries;
 using Data.SeaHavenIndustries.Enums;
-using Microsoft.Extensions.Configuration;
+using Microsoft.Extensions.Options;
 using Moq;
 using SeaHaven.DataServices.Interfaces;
+using SeaHaven.Services.Configuration;
 using SeaHaven.Services.DTOs;
 using SeaHaven.Services.Implementation;
 using SeaHaven.Services.Interfaces;
@@ -209,7 +210,7 @@ public class WorkOrderDispatchServiceBehaviorTests
             Mock.Of<ICommentDataService>(),
             Mock.Of<IDispatchEmailPort>(),
             Mock.Of<IVendorTokenPort>(),
-            Mock.Of<IConfiguration>());
+            Options.Create(new FrontendOptions()));
     }
 }
 
diff --git a/Api.SeaHavenIndustries.Tests/ServiceRegistrationTests.cs b/Api.SeaHavenIndustries.Tests/ServiceRegistrationTests.cs
index 660307b..ad81b94 100644
--- a/Api.SeaHavenIndustries.Tests/ServiceRegistrationTests.cs
+++ b/Api.SeaHavenIndustries.Tests/ServiceRegistrationTests.cs
@@ -18,9 +18,10 @@ public class ServiceRegistrationTests
 {
     private static ServiceProvider BuildProvider()
     {
+        var configuration = new ConfigurationBuilder().Build();
         var services = new ServiceCollection();
         services.AddLogging();
-        services.AddSingleton<IConfiguration>(new ConfigurationBuilder().Build());
+        services.AddSingleton<IConfiguration>(configuration);
         services.AddSingleton<IZipCodeDistance>(_ => new DummyZipCodeDistance());
         services.AddSingleton<IEmailSender>(_ => new DummyEmailSender());
 
@@ -31,7 +32,7 @@ public class ServiceRegistrationTests
             .AddEntityFrameworkStores<ApplicationDbContext>();
 
         services.AddDataServices();
-        services.AddBusinessServices();
+        services.AddBusinessServices(configuration);
 
         return services.BuildServiceProvider();
     }
diff --git a/Api.SeaHavenIndustries.Tests/UpliftControllerTests.cs b/Api.SeaHavenIndustries.Tests/UpliftControllerTests.cs
index c6ab45a..7c2f89f 100644
--- a/Api.SeaHavenIndustries.Tests/UpliftControllerTests.cs
+++ b/Api.SeaHavenIndustries.Tests/UpliftControllerTests.cs
@@ -34,7 +34,9 @@ public class UpliftControllerTests
         var service = new Mock<IUpliftService>();
         var dto = new UpliftListResultDTO
         {
-            Total = 1, Page = 1, PageSize = 25,
+            Total = 1,
+            Page = 1,
+            PageSize = 25,
             Items = new[] { new UpliftListItemDTO { Id = 5, Status = "Pending" } }
         };
         service.Setup(x => x.ListAsync(It.IsAny<ClaimsPrincipal>(), "Pending", null, 1, 25, It.IsAny<CancellationToken>()))
@@ -107,7 +109,8 @@ public class UpliftControllerTests
 
         var ok = result.Should().BeOfType<OkObjectResult>().Subject;
         var envelope = ok.Value.Should().BeOfType<DataResponse>().Subject;
-        ((UpliftApproveResultDTO)envelope.Data).Should().Be(approved);
+        var approveData = envelope.Data as UpliftApproveResultDTO;
+        approveData.Should().Be(approved);
     }
 
     [Fact]
diff --git a/Api.SeaHavenIndustries.Tests/VendorPortalControllerTests.cs b/Api.SeaHavenIndustries.Tests/VendorPortalControllerTests.cs
index 91a2f49..d2900c1 100644
--- a/Api.SeaHavenIndustries.Tests/VendorPortalControllerTests.cs
+++ b/Api.SeaHavenIndustries.Tests/VendorPortalControllerTests.cs
@@ -24,7 +24,11 @@ public class VendorPortalControllerTests
 
     private static readonly VendorPortalSession Session = new()
     {
-        Id = 1, CompanyName = "Test Co", ContactName = "Sam", Email = "sam@test.co", Phone = "555-0100"
+        Id = 1,
+        CompanyName = "Test Co",
+        ContactName = "Sam",
+        Email = "sam@test.co",
+        Phone = "555-0100"
     };
 
     [Fact]
@@ -64,7 +68,8 @@ public class VendorPortalControllerTests
         var ok = result.Should().BeOfType<OkObjectResult>().Subject;
         var envelope = ok.Value.Should().BeOfType<DataResponse>().Subject;
         envelope.Status.Should().Be("Success");
-        ((VendorPortalSession)envelope.Data).Should().Be(Session);
+        var sessionData = envelope.Data as VendorPortalSession;
+        sessionData.Should().Be(Session);
     }
 
     [Fact]
@@ -146,7 +151,8 @@ public class VendorPortalControllerTests
 
         var ok = result.Should().BeOfType<OkObjectResult>().Subject;
         var envelope = ok.Value.Should().BeOfType<DataResponse>().Subject;
-        ((AcceptDispatchResultDTO)envelope.Data).Should().Be(acceptResult);
+        var acceptData = envelope.Data as AcceptDispatchResultDTO;
+        acceptData.Should().Be(acceptResult);
     }
 
     [Fact]
@@ -210,7 +216,10 @@ public class VendorPortalControllerTests
 
         var result = await controller.AddSignoff(10, new VendorPortalController.SignoffRequest
         {
-            SignoffType = "vendor", Name = "Name", Signature = "sig", SignatureMethod = "drawn"
+            SignoffType = "vendor",
+            Name = "Name",
+            Signature = "sig",
+            SignatureMethod = "drawn"
         });
 
         result.Should().BeOfType<BadRequestObjectResult>();
@@ -244,12 +253,14 @@ public class VendorPortalControllerTests
 
         var result = await controller.RequestUplift(10, new VendorPortalController.UpliftRequestBody
         {
-            RequestedNTE = 500m, Reason = "Need more parts"
+            RequestedNTE = 500m,
+            Reason = "Need more parts"
         });
 
         var ok = result.Should().BeOfType<OkObjectResult>().Subject;
         var envelope = ok.Value.Should().BeOfType<DataResponse>().Subject;
-        ((UpliftRequestResultDTO)envelope.Data).Should().Be(upliftResult);
+        var upliftData = envelope.Data as UpliftRequestResultDTO;
+        upliftData.Should().Be(upliftResult);
     }
 
     [Fact]
@@ -282,7 +293,8 @@ public class VendorPortalControllerTests
 
         var ok = result.Should().BeOfType<OkObjectResult>().Subject;
         var envelope = ok.Value.Should().BeOfType<DataResponse>().Subject;
-        ((CancelUpliftResultDTO)envelope.Data).Should().Be(cancelResult);
+        var cancelData = envelope.Data as CancelUpliftResultDTO;
+        cancelData.Should().Be(cancelResult);
     }
 
     [Fact]
diff --git a/Api.SeaHavenIndustries.Tests/VendorServiceTests.cs b/Api.SeaHavenIndustries.Tests/VendorServiceTests.cs
index ccc909b..3f4f6bc 100644
--- a/Api.SeaHavenIndustries.Tests/VendorServiceTests.cs
+++ b/Api.SeaHavenIndustries.Tests/VendorServiceTests.cs
@@ -2,9 +2,10 @@ using Data.SeaHavenIndustries;
 using Data.SeaHavenIndustries.Enums;
 using FluentAssertions;
 using FluentValidation;
-using Microsoft.Extensions.Configuration;
+using Microsoft.Extensions.Options;
 using Moq;
 using SeaHaven.DataServices.Interfaces;
+using SeaHaven.Services.Configuration;
 using SeaHaven.Services.DTOs;
 using SeaHaven.Services.Implementation;
 using SeaHaven.Services.Interfaces;
@@ -20,7 +21,7 @@ public class VendorServiceTests
             data.Object,
             Mock.Of<IVendorPortalTokenService>(),
             Mock.Of<IZipCodeDistance>(),
-            new ConfigurationBuilder().Build(),
+            Options.Create(new FrontendOptions()),
             new CreateVendorValidation(),
             new UpdateVendorValidation(),
             new WorkOrderVendorUpdateValidation());
diff --git a/Api.SeaHavenIndustries.Tests/WorkOrderDataServiceBatchingTests.cs b/Api.SeaHavenIndustries.Tests/WorkOrderDataServiceBatchingTests.cs
new file mode 100644
index 0000000..a32815f
--- /dev/null
+++ b/Api.SeaHavenIndustries.Tests/WorkOrderDataServiceBatchingTests.cs
@@ -0,0 +1,104 @@
+using Data.SeaHavenIndustries;
+using FluentAssertions;
+using Microsoft.EntityFrameworkCore;
+using SeaHaven.DataServices.Implementation;
+using Xunit;
+
+namespace Api.SeaHavenIndustries.Tests;
+
+public class WorkOrderDataServiceBatchingTests
+{
+    private static ApplicationDbContext NewContext()
+    {
+        var options = new DbContextOptionsBuilder<ApplicationDbContext>()
+            .UseInMemoryDatabase(Guid.NewGuid().ToString())
+            .Options;
+        return new ApplicationDbContext(options);
+    }
+
+    private static async Task SeedAsync(ApplicationDbContext context)
+    {
+        context.Locations.Add(new Locations { Id = 100, Name = "Site A", Address1 = "1 Main St" });
+        context.workOrders.AddRange(
+            new WorkOrder { Id = 1, InternalWONumber = "WO-1", WorkerOrderTitle = "First", LocationId = 100 },
+            new WorkOrder { Id = 2, InternalWONumber = "WO-2", WorkerOrderTitle = "Second", LocationId = 100 },
+            new WorkOrder { Id = 3, InternalWONumber = "WO-3", WorkerOrderTitle = "Third", LocationId = 100 },
+            new WorkOrder { Id = 4, InternalWONumber = "WO-T", WorkerOrderTitle = "Template", LocationId = 100, istemplate = true });
+        await context.SaveChangesAsync();
+    }
+
+    [Fact]
+    public async Task GetByRequestedIdsWithDetailsAsync_ReturnsResultsInInputOrder()
+    {
+        await using var context = NewContext();
+        await SeedAsync(context);
+        var service = new WorkOrderDataService(context);
+
+        var result = await service.GetByRequestedIdsWithDetailsAsync(
+            new[] { 3, 1, 2 },
+            CancellationToken.None);
+
+        result.Select(w => w.Id).Should().Equal(new[] { 3, 1, 2 });
+    }
+
+    [Fact]
+    public async Task GetByRequestedIdsWithDetailsAsync_DeduplicatesIdsAndSkipsMissing()
+    {
+        await using var context = NewContext();
+        await SeedAsync(context);
+        var service = new WorkOrderDataService(context);
+
+        var result = await service.GetByRequestedIdsWithDetailsAsync(
+            new[] { 2, 2, 999, 1 },
+            CancellationToken.None);
+
+        result.Select(w => w.Id).Should().Equal(new[] { 2, 1 });
+    }
+
+    [Fact]
+    public async Task GetByRequestedIdsWithDetailsAsync_ExcludesTemplatesAndEagerLoadsLocation()
+    {
+        await using var context = NewContext();
+        await SeedAsync(context);
+        var service = new WorkOrderDataService(context);
+
+        var result = await service.GetByRequestedIdsWithDetailsAsync(
+            new[] { 1, 4 },
+            CancellationToken.None);
+
+        result.Select(w => w.Id).Should().Equal(new[] { 1 });
+        result.Single().Locations.Should().NotBeNull();
+        result.Single().Locations!.Name.Should().Be("Site A");
+    }
+
+    [Fact]
+    public async Task AddAuditLogsAsync_PersistsAllRowsInSingleSave()
+    {
+        await using var context = NewContext();
+        await SeedAsync(context);
+        var service = new WorkOrderDataService(context);
+
+        await service.AddAuditLogsAsync(new[]
+        {
+            new WorkOrderAuditLog { WorkOrderId = 1, FieldName = "Dispatch", Action = "Dispatch" },
+            new WorkOrderAuditLog { WorkOrderId = 2, FieldName = "Dispatch", Action = "Dispatch" }
+        });
+
+        context.WorkOrderAuditLogs.Should().HaveCount(2);
+    }
+
+    [Fact]
+    public async Task GetByIdsOrderedAsync_PreservesInputOrderDeduplicatesAndSkipsMissing()
+    {
+        await using var context = NewContext();
+        context.Vendors.AddRange(
+            new Vendor { Id = 7, CompanyName = "V7", Email = "v7@x.io" },
+            new Vendor { Id = 8, CompanyName = "V8", Email = "v8@x.io" });
+        await context.SaveChangesAsync();
+        var service = new VendorDataService(context);
+
+        var result = await service.GetByIdsOrderedAsync(new[] { 8, 8, 7, 999 }, CancellationToken.None);
+
+        result.Select(v => v.Id).Should().Equal(new[] { 8, 7 });
+    }
+}
diff --git a/Api.SeaHavenIndustries/Program.cs b/Api.SeaHavenIndustries/Program.cs
index 211429c..c711931 100644
--- a/Api.SeaHavenIndustries/Program.cs
+++ b/Api.SeaHavenIndustries/Program.cs
@@ -52,7 +52,7 @@ builder.Services.AddSingleton<SeaHaven.Services.Interfaces.IZipCodeDistance>(
     serviceProvider => serviceProvider.GetRequiredService<Api.SeaHavenIndustries.Helper.ZipCodeDistance>());
 
 builder.Services.AddDataServices();
-builder.Services.AddBusinessServices();
+builder.Services.AddBusinessServices(configuration);
 builder.Services.AddScoped<SeaHaven.Services.Interfaces.ISyncExternalSource, Api.SeaHavenIndustries.Infrastructure.DynamoSyncExternalSource>();
 builder.Services.AddScoped<SeaHaven.Services.Interfaces.IFileStoragePort, Api.SeaHavenIndustries.Infrastructure.FileStorageAdapter>();
 builder.Services.AddScoped<SeaHaven.Services.Interfaces.IDispatchEmailPort, Api.SeaHavenIndustries.Infrastructure.DispatchEmailAdapter>();
@@ -74,7 +74,9 @@ builder.Services.AddAuthentication(options =>
         ValidateAudience = true,
         ValidAudience = configuration["JWT:ValidAudience"],
         ValidIssuer = configuration["JWT:ValidIssuer"],
-        IssuerSigningKey = new SymmetricSecurityKey(Encoding.UTF8.GetBytes(configuration["JWT:Secret"]))
+        IssuerSigningKey = new SymmetricSecurityKey(Encoding.UTF8.GetBytes(
+            configuration["JWT:Secret"]
+            ?? throw new InvalidOperationException("JWT:Secret configuration is required")))
     };
 });
 builder.Services.AddEndpointsApiExplorer();
diff --git a/BACKEND_ARCHITECTURE.md b/BACKEND_ARCHITECTURE.md
index ee1d809..ca27a73 100644
--- a/BACKEND_ARCHITECTURE.md
+++ b/BACKEND_ARCHITECTURE.md
@@ -1,564 +1,106 @@
-# Backend Architecture Guide
+# Backend Architecture and Quality Rules
 
-## 🏗️ Clean Architecture Overview
+This repository uses a feature-oriented service boundary over Entity Framework Core:
 
-The backend follows **Clean Architecture** with strict layer separation:
-
-```
-┌─────────────────────────────────────────────────────────────┐
-│                    API LAYER (Controllers)                   │
-│  - HTTP Request/Response                                     │
-│  - Authentication & Authorization                            │
-│  - Exception Handling                                        │
-│  - Input Validation (basic)                                  │
-└─────────────────┬───────────────────────────────────────────┘
-                  │ Calls
-                  ▼
-┌─────────────────────────────────────────────────────────────┐
-│                   SERVICE LAYER (Business Logic)             │
-│  - Business Rules                                            │
-│  - FluentValidation (detailed validation)                    │
-│  - Data Transformation                                       │
-│  - Orchestration                                             │
-└─────────────────┬───────────────────────────────────────────┘
-                  │ Calls
-                  ▼
-┌─────────────────────────────────────────────────────────────┐
-│                 DATA SERVICE LAYER (Persistence)             │
-│  - Database Access                                           │
-│  - Entity Operations (CRUD)                                  │
-│  - Query Building                                            │
-│  - Transaction Management                                    │
-└─────────────────┬───────────────────────────────────────────┘
-                  │ Uses
-                  ▼
-┌─────────────────────────────────────────────────────────────┐
-│                    DATA LAYER (EF Core)                      │
-│  - DbContext                                                 │
-│  - Entity Models                                             │
-│  - Database Schema                                           │
-└─────────────────────────────────────────────────────────────┘
+```text
+HTTP controller -> I{Feature}Service -> I{Feature}DataService -> ApplicationDbContext
 ```
 
----
-
-## 📁 Project Structure
-
-```
-backend/shoc-backend/
-│
-├── Api.SeaHavenIndustries/          # 🌐 API Layer
-│   ├── Controllers/                  # HTTP endpoints
-│   ├── DTOs/                         # Data Transfer Objects (API contracts)
-│   ├── Program.cs                    # App startup & DI registration
-│   └── appsettings.json             # Configuration
-│
-├── SeaHaven.Services/               # 💼 Service Layer (Business Logic)
-│   ├── Interfaces/                   # Service contracts (IContactService, etc.)
-│   ├── Implementation/               # Service implementations
-│   ├── DTOs/                         # Internal DTOs for service layer
-│   └── Validators/                   # FluentValidation validators
-│
-├── SeaHaven.DataServices/           # 💾 Data Access Layer
-│   ├── Interfaces/                   # DataService contracts (IContactDataService, etc.)
-│   ├── Implementation/               # DataService implementations
-│   └── DTOs/                         # Data layer DTOs
-│
-└── Data.SeaHavenIndustries/         # 🗄️ Data Layer (EF Core)
-    ├── Models/                       # Entity models (Contact, Employee, etc.)
-    ├── ApplicationDbContext.cs       # EF Core DbContext
-    └── Migrations/                   # Database migrations
-```
-
----
-
-## 🔄 Data Flow Example (Creating a Contact)
-
-### 1️⃣ **API Layer** (`ContactController.cs`)
-```csharp
-[HttpPost("Create")]
-public async Task<IActionResult> AddContacts(Contact_DTO dto)
-{
-    try
-    {
-        // Get authenticated user ID
-        var userId = _userManager.GetUserId(User);
-        if (userId == null)
-            return Unauthorized(new Response { Status = "Error", Message = "User not authenticated" });
-
-        // Convert API DTO → Service DTO
-        var serviceDto = dto.ToServiceCreateDTO();
-        
-        // Call Service Layer
-        await _contactService.CreateContactAsync(serviceDto, userId);
-        
-        return Ok(new Response { Status = "Success", Message = "Contact created" });
-    }
-    catch (ValidationException vex)
-    {
-        var errors = string.Join(", ", vex.Errors.Select(e => e.ErrorMessage));
-        return BadRequest(new Response { Status = "Validation Error", Message = errors });
-    }
-    catch (KeyNotFoundException)
-    {
-        return NotFound(new Response { Status = "Error", Message = "Resource not found" });
-    }
-    catch (Exception ex)
-    {
-        return StatusCode(500, new Response { Status = "Error", Message = ex.Message });
-    }
-}
-```
-
-**Responsibilities:**
-- ✅ Authenticate user
-- ✅ Extract user ID from claims
-- ✅ Map API DTO to Service DTO
-- ✅ Catch exceptions and return proper HTTP status codes
-- ❌ NO business logic
-- ❌ NO database access
-
----
-
-### 2️⃣ **Service Layer** (`ContactService.cs`)
-
-```csharp
-public class ContactService : IContactService
-{
-    private readonly IContactDataService _dataService;
-    private readonly IValidator<CreateContactDTO> _createValidator;
-    
-    public ContactService(
-        IContactDataService dataService,
-        IValidator<CreateContactDTO> createValidator)
-    {
-        _dataService = dataService;
-        _createValidator = createValidator;
-    }
-    
-    public async Task<ContactDTO> CreateContactAsync(CreateContactDTO dto, string userId)
-    {
-        // STEP 1: Validate using FluentValidation
-        var validationResult = await _createValidator.ValidateAsync(dto);
-        if (!validationResult.IsValid)
-        {
-            throw new ValidationException(validationResult.Errors);
-        }
-        
-        // STEP 2: Business logic (if any)
-        // Example: Check for duplicates, apply business rules, etc.
-        
-        // STEP 3: Map Service DTO → Data DTO
-        var dataDto = new CreateContactDataDTO
-        {
-            FirstName = dto.FirstName,
-            LastName = dto.LastName,
-            Email = dto.Email,
-            Phone = dto.Phone
-        };
-        
-        // STEP 4: Call Data Service Layer
-        var createdContact = await _dataService.CreateAsync(dataDto, userId);
-        
-        // STEP 5: Map Data DTO → Service DTO and return
-        return new ContactDTO
-        {
-            Id = createdContact.Id,
-            FirstName = createdContact.FirstName,
-            LastName = createdContact.LastName,
-            Email = createdContact.Email,
-            Phone = createdContact.Phone
-        };
-    }
-}
-```
-
-**Responsibilities:**
-- ✅ Validate input using FluentValidation
-- ✅ Apply business rules
-- ✅ Orchestrate operations
-- ✅ Transform data between layers
-- ❌ NO HTTP concerns
-- ❌ NO direct database access
-
----
-
-### 3️⃣ **Data Service Layer** (`ContactDataService.cs`)
-
-```csharp
-public class ContactDataService : IContactDataService
-{
-    private readonly ApplicationDbContext _db;
-    
-    public ContactDataService(ApplicationDbContext db)
-    {
-        _db = db;
-    }
-    
-    public async Task<ContactDataDTO> CreateAsync(CreateContactDataDTO dto, string userId)
-    {
-        // STEP 1: Create entity from DTO
-        var contact = new Contact
-        {
-            FirstName = dto.FirstName,
-            LastName = dto.LastName,
-            Email = dto.Email,
-            Phone = dto.Phone,
-            CreatedBy = userId,
-            CreatedDate = DateTime.UtcNow,
-            ModifiedBy = userId,
-            ModifiedDate = DateTime.UtcNow
-        };
-
-        // STEP 2: Add to database
-        _db.Contacts.Add(contact);
-        await _db.SaveChangesAsync();
-
-        // STEP 3: Map entity → Data DTO and return
-        return new ContactDataDTO
-        {
-            Id = contact.Id,
-            FirstName = contact.FirstName,
-            LastName = contact.LastName,
-            Email = contact.Email,
-            Phone = contact.Phone
-        };
-    }
-}
-```
-
-**Responsibilities:**
-- ✅ Direct database operations (CRUD)
-- ✅ Entity mapping
-- ✅ Set audit fields (CreatedBy, CreatedDate, etc.)
-- ✅ Transaction management
-- ❌ NO validation
-- ❌ NO business logic
-
----
-
-## 🔌 Dependency Injection (DI)
-
-### Automatic Assembly Scanning
-
-Services are **automatically registered** by scanning assemblies using naming convention.
-
-**In `Program.cs`:**
-```csharp
-builder.Services.AddDataServices();       // Auto-register all Data Services
-builder.Services.AddBusinessServices();   // Auto-register all Business Services + Validators
-```
-
-### How It Works
-
-**Module Files:**
-- `SeaHaven.DataServices/DependencyInjection/DataServicesModule.cs`
-- `SeaHaven.Services/DependencyInjection/ServicesModule.cs`
-
-**Process:**
-1. Scans assembly for all classes
-2. Finds interface matching pattern `I{ClassName}`
-3. Registers as Scoped service
-4. Also auto-registers FluentValidation validators
-
-### Naming Convention Required
-
-| Interface | Implementation | Registered? |
-|-----------|---------------|-------------|
-| `IContactService` | `ContactService` | ✅ YES |
-| `IContactDataService` | `ContactDataService` | ✅ YES |
-| `ISomething` | `SomethingDifferent` | ❌ NO |
-
-**Rule**: Interface must be `I` + Class name exactly
-
-### Usage in Code
-
-Once registered, inject via constructor:
-
-```csharp
-public class ContactController : Controller
-{
-    private readonly IContactService _contactService;
-
-    public ContactController(IContactService contactService)
-    {
-        _contactService = contactService;
-    }
-}
-```
-
-### Benefits
-
-✅ No manual registration - just follow naming convention
-✅ Auto-discovery - new services work automatically
-✅ FluentValidation auto-registered
-
----
-
-## ✅ FluentValidation
-
-### Validator Example (`CreateContactDTOValidator.cs`)
-
-```csharp
-public class CreateContactDTOValidator : AbstractValidator<CreateContactDTO>
-{
-    public CreateContactDTOValidator()
-    {
-        RuleFor(x => x.FirstName)
-            .NotEmpty().WithMessage("First name is required")
-            .MaximumLength(50).WithMessage("First name cannot exceed 50 characters");
-
-        RuleFor(x => x.LastName)
-            .NotEmpty().WithMessage("Last name is required")
-            .MaximumLength(50).WithMessage("Last name cannot exceed 50 characters");
-
-        RuleFor(x => x.Email)
-            .NotEmpty().WithMessage("Email is required")
-            .EmailAddress().WithMessage("Invalid email format")
-            .MaximumLength(100).WithMessage("Email cannot exceed 100 characters");
-
-        RuleFor(x => x.Phone)
-            .Matches(@"^\+?[1-9]\d{1,14}$").When(x => !string.IsNullOrEmpty(x.Phone))
-            .WithMessage("Invalid phone number format");
-    }
-}
-```
-
-### Where Validation Happens
-
-```
-❌ Controller   → NO detailed validation (only catches ValidationException)
-✅ Service      → YES - FluentValidation runs here
-❌ DataService  → NO validation
-```
-
----
-
-## 🎯 Interface Examples
-
-### Service Interface (`IContactService.cs`)
-```csharp
-public interface IContactService
-{
-    Task<ContactDTO> CreateContactAsync(CreateContactDTO dto, string userId);
-    Task<ContactDTO> UpdateContactAsync(int id, UpdateContactDTO dto, string userId);
-    Task DeleteContactAsync(int id, string userId);
-    Task<ContactDTO> GetContactByIdAsync(int id);
-    Task<PagedResult<ContactDTO>> GetContactsPagedAsync(int page, int pageSize, string? search);
-}
-```
-
-### Data Service Interface (`IContactDataService.cs`)
-```csharp
-public interface IContactDataService
-{
-    Task<ContactDataDTO> CreateAsync(CreateContactDataDTO dto, string userId);
-    Task<ContactDataDTO> UpdateAsync(int id, UpdateContactDataDTO dto, string userId);
-    Task DeleteAsync(int id, string userId);
-    Task<ContactDataDTO?> GetByIdAsync(int id);
-    Task<PagedResult<ContactDataDTO>> GetPagedAsync(int page, int pageSize, string? search);
-}
-```
-
----
-
-## 📦 DTO Types
-
-### 1. **API DTOs** (`Api.SeaHavenIndustries/DTOs/`)
-- Used for HTTP requests/responses
-- Map to frontend JSON structure
-- Example: `Contact_DTO`, `EditContact_DTO`
-
-### 2. **Service DTOs** (`SeaHaven.Services/DTOs/`)
-- Used between Controller ↔ Service
-- Business-focused structure
-- Example: `CreateContactDTO`, `UpdateContactDTO`, `ContactDTO`
-
-### 3. **Data DTOs** (`SeaHaven.DataServices/DTOs/`)
-- Used between Service ↔ DataService
-- Database-focused structure
-- Example: `CreateContactDataDTO`, `ContactDataDTO`
-
-### DTO Mapping Flow
-```
-API DTO  →  Service DTO  →  Data DTO  →  Entity
-(HTTP)      (Business)      (Data)      (Database)
-```
-
----
-
-## 🚨 Exception Handling Pattern
-
-### Controller Exception Handling (STANDARD PATTERN)
-
-```csharp
-[HttpPost("Create")]
-public async Task<IActionResult> Create([FromBody] SomeDTO dto)
-{
-    try
-    {
-        // Get user ID
-        var userId = User.FindFirstValue(ClaimTypes.NameIdentifier);
-        if (userId == null)
-            return Unauthorized(new Response { Status = "Error", Message = "User not authenticated" });
-
-        // Call service
-        await _service.CreateAsync(dto, userId);
-
-        return Ok(new Response { Status = "Success", Message = "Created successfully" });
-    }
-    catch (ValidationException vex)  // ⚠️ CATCH THIS FIRST
-    {
-        var errors = string.Join(", ", vex.Errors.Select(e => e.ErrorMessage));
-        return BadRequest(new Response { Status = "Validation Error", Message = errors });
-    }
-    catch (KeyNotFoundException)  // ⚠️ THEN THIS
-    {
-        return NotFound(new Response { Status = "Error", Message = "Not found" });
-    }
-    catch (Exception ex)  // ⚠️ GENERIC LAST
-    {
-        return StatusCode(500, new Response { Status = "Error", Message = ex.Message });
-    }
-}
-```
-
-### HTTP Status Code Mapping
-- **200 OK** → Success
-- **400 Bad Request** → Validation errors
-- **401 Unauthorized** → Not authenticated
-- **404 Not Found** → Resource not found
-- **500 Internal Server Error** → Unexpected errors
-
----
-
-## 🔐 Authentication & User ID
-
-### Getting User ID (Two Methods)
-
-**Method 1: Using Claims (Preferred)**
-```csharp
-var userId = User.FindFirstValue(ClaimTypes.NameIdentifier);
-if (userId == null)
-    return Unauthorized(new Response { Status = "Error", Message = "User not authenticated" });
-```
-
-**Method 2: Using UserManager (for Identity)**
-```csharp
-var userId = _userManager.GetUserId(User);
-if (userId == null)
-    return Unauthorized(new Response { Status = "Error", Message = "User not authenticated" });
-```
-
-### Audit Fields
-Every entity should track:
-- `CreatedBy` (string - User ID GUID)
-- `CreatedDate` (DateTime)
-- `ModifiedBy` (string - User ID GUID)
-- `ModifiedDate` (DateTime)
-
----
-
-## 📋 Naming Conventions
-
-### Controllers
-- Named after entity + "Controller"
-- Example: `ContactController`, `EmployeeController`
-
-### Services
-- Interface: `I[Entity]Service`
-- Implementation: `[Entity]Service`
-- Example: `IContactService`, `ContactService`
-
-### Data Services
-- Interface: `I[Entity]DataService`
-- Implementation: `[Entity]DataService`
-- Example: `IContactDataService`, `ContactDataService`
-
-### DTOs
-- API Layer: `[Entity]_DTO`, `Edit[Entity]_DTO`
-- Service Layer: `Create[Entity]DTO`, `Update[Entity]DTO`, `[Entity]DTO`
-- Data Layer: `Create[Entity]DataDTO`, `[Entity]DataDTO`
-
----
-
-## ✅ Best Practices Checklist
-
-### Controllers
-- [ ] Use dependency injection for services
-- [ ] Get user ID from `User.FindFirstValue(ClaimTypes.NameIdentifier)`
-- [ ] Return 401 if userId is null
-- [ ] Catch `ValidationException` BEFORE generic `Exception`
-- [ ] Return appropriate HTTP status codes
-- [ ] NO business logic in controllers
-- [ ] NO direct database access (`_db`)
-
-### Services
-- [ ] Validate using FluentValidation
-- [ ] Throw `ValidationException` for validation errors
-- [ ] Throw `KeyNotFoundException` for not found
-- [ ] Pass userId to DataService
-- [ ] Transform DTOs between layers
-- [ ] Implement business rules here
-
-### Data Services
-- [ ] Direct database access only
-- [ ] Set audit fields (CreatedBy, CreatedDate, ModifiedBy, ModifiedDate)
-- [ ] Use async/await for all database operations
-- [ ] NO validation logic
-- [ ] NO business logic
-
----
-
-## 🎓 Quick Reference
-
-| Layer | Purpose | Can Access | Cannot Access |
-|-------|---------|-----------|---------------|
-| **Controller** | HTTP handling, auth | Service layer | Database directly |
-| **Service** | Business logic, validation | DataService layer | Database directly |
-| **DataService** | Database operations | DbContext, Entities | HTTP context |
-| **Data** | Entity definitions | Nothing (POCOs) | Application logic |
-
----
-
-## 📚 Example: Full CRUD Implementation
-
-See these files for complete examples:
-- **Contact**: `ContactController.cs`, `ContactService.cs`, `ContactDataService.cs`
-- **Employee**: `EmployeeController.cs`, `EmployeeService.cs`, `EmployeeDataService.cs`
-- **Asset**: `AssetController.cs`, `AssetService.cs`, `AssetDataService.cs`
-
-All follow the same Clean Architecture pattern!
-
----
-
-## 🔐 Configuration & Secrets
-
-No secrets are stored in source. The committed `appsettings*.json` files hold only
-`${PLACEHOLDER}` tokens; real values must be supplied at runtime through one of the
-standard .NET configuration sources (later sources win):
-
-1. `appsettings.json` / `appsettings.{Environment}.json` — committed, placeholders only.
-2. **User Secrets** (local dev): `dotnet user-secrets set "Section:Key" "value"`.
-3. **Environment variables** — use `__` (double underscore) as the section separator.
-   In AWS Elastic Beanstalk these are the environment properties.
-
-See `.env.example` in the repo root for the full list. Required values:
-
-| Setting | Env-var form | Used by | Notes |
-|---|---|---|---|
-| `ConnectionStrings:DefaultConnection` | `ConnectionStrings__DefaultConnection` | Both projects | SQL Server connection string |
-| `SendGrid:ApiKey` | `SendGrid__ApiKey` | Both projects | Transactional email |
-| `JWT:Secret` | `JWT__Secret` | `Api.SeaHavenIndustries` | JWT signing key |
-| `GoogleMaps:ApiKey` | `GoogleMaps__ApiKey` | `SeaHavenIndustries` (Blazor) | Maps/Places; read in `App.razor` + `Home.razor` |
-
-### AWS credentials
-
-`UploadFileHp` (S3 uploads) uses the **AWS SDK default credential chain** — it no longer
-hardcodes access keys. Credentials resolve from `AWS_ACCESS_KEY_ID` / `AWS_SECRET_ACCESS_KEY`
-env vars, the shared profile/SSO, or (preferred in production) the EC2/ECS instance role.
-The region comes from `AddDefaultAWSOptions` in `Program.cs`.
-
-> ⚠️ The secrets previously committed to this repo (DB password, SendGrid key, JWT secret,
-> Google Maps keys, AWS access key) should be considered compromised and **rotated**.
-
+The interfaces are architectural seams, not a requirement to wrap every class or every
+EF method. Add an interface when it separates HTTP, business, persistence, or external
+I/O responsibilities and enables behavior-focused testing.
+
+## Layer responsibilities
+
+### API controllers
+
+- Parse HTTP input, authorize the caller, invoke a business-service interface, and map
+  the result to the established HTTP contract.
+- Do not inject `ApplicationDbContext`, concrete service implementations, or concrete
+  data-service implementations.
+- Do not contain persistence queries or business workflows.
+- Do not expose exception messages to clients. Map known failures explicitly and let the
+  centralized exception boundary handle unexpected failures.
+
+### Business services
+
+- Own validation, business decisions, orchestration, and transaction intent.
+- Depend on interfaces for persistence and external I/O.
+- Use `IOptions<T>` for typed configuration. Do not inject `IConfiguration`.
+- Keep feature responsibilities cohesive. Split a service when it has independently
+  changing business reasons, not because it crossed an arbitrary line count.
+- Preserve existing API and board-backed behavior unless the accepted requirement
+  explicitly changes it.
+
+### Data services
+
+- Own EF Core query shape, persistence, batching, and transaction implementation.
+- Accept cancellation tokens on new I/O methods and pass them to EF Core.
+- Use `AsNoTracking()` for read-only queries.
+- Project only required columns for list/read models; include full graphs only when the
+  caller needs them.
+- Page unbounded collections at the database.
+- Avoid query-in-loop and save-in-loop patterns. Prefer set-based reads and batched writes
+  while preserving the workflow's failure and transaction semantics.
+- Do not introduce a generic repository over EF Core. Feature data services should expose
+  intent-revealing operations.
+
+## Performance review
+
+For each changed hot path, document and test:
+
+- input size variables;
+- CPU and memory complexity;
+- database round trips;
+- whether filtering, ordering, and paging execute in SQL;
+- whether tracking is necessary;
+- whether repeated work can be hoisted out of loops;
+- the partial-failure and transaction behavior.
+
+Prefer dictionary or hash-set reconstruction when database results must follow caller
+order. A query followed by dictionary reconstruction is normally `O(n)` CPU and memory;
+repeated `First`/`Single` scans over the result are `O(n²)`.
+
+Do not optimize by weakening correctness. In particular, batching all writes into one
+final save can change partial-success behavior, and adding a transaction can change
+locking and retry semantics. Those are business decisions, not mechanical cleanup.
+
+## Configuration
+
+Configuration is bound once during composition in
+`SeaHaven.Services/DependencyInjection/ServicesModule.cs`. Business services receive
+typed options such as `FrontendOptions`, `JwtOptions`, `ApprovalsOptions`, and
+`VendorPortalOptions`.
+
+Defaults must preserve current behavior. Startup validation should be introduced only
+when every deployed environment is known to provide the required value.
+
+## Enforcement
+
+`ArchitectureTests` enforces mechanical dependency rules:
+
+- controllers cannot inject EF contexts or concrete service/data-service classes;
+- business services cannot inject EF contexts or raw `IConfiguration`.
+
+The pull-request quality workflow runs those tests and verifies formatting for changed
+C# files. The normal CI workflow builds the solution and runs the full test suite.
+
+Architecture tests are appropriate for dependency direction. Behavior belongs in tests
+through public interfaces. Do not add tests merely to prove a linter or analyzer itself
+works; test the product behavior the rule protects.
+
+## Review checklist
+
+- Controller depends only on service abstractions.
+- Business logic is in a cohesive feature service.
+- EF operations are behind a feature data-service abstraction.
+- No raw `IConfiguration` in a business service.
+- No unbounded load followed by in-memory filtering.
+- No query/save loop where a set-based operation preserves semantics.
+- Read-only EF queries use no tracking.
+- New async I/O accepts and propagates cancellation where the public contract permits.
+- Errors do not leak internal exception details.
+- Tests cover behavior, authorization, data contracts, ordering, duplicates, missing
+  records, and relevant failure boundaries.
+- Changed behavior has been checked against the authoritative ticket board. Missing board
+  access blocks readiness and merge claims.
diff --git a/SeaHaven.DataServices/Implementation/VendorDataService.cs b/SeaHaven.DataServices/Implementation/VendorDataService.cs
index 2ae49cf..d6767dc 100644
--- a/SeaHaven.DataServices/Implementation/VendorDataService.cs
+++ b/SeaHaven.DataServices/Implementation/VendorDataService.cs
@@ -29,6 +29,28 @@ namespace SeaHaven.DataServices.Implementation
                 .FirstOrDefaultAsync();
         }
 
+        public async Task<IReadOnlyList<Vendor>> GetByIdsOrderedAsync(IReadOnlyCollection<int> ids, CancellationToken cancellationToken)
+        {
+            var orderedIds = ids.Distinct().ToList();
+            if (orderedIds.Count == 0)
+                return Array.Empty<Vendor>();
+
+            var loaded = await _context.Vendors
+                .AsNoTracking()
+                .Where(v => orderedIds.Contains(v.Id))
+                .ToListAsync(cancellationToken);
+
+            var byId = loaded.ToDictionary(v => v.Id);
+            var ordered = new List<Vendor>(orderedIds.Count);
+            foreach (var id in orderedIds)
+            {
+                if (byId.TryGetValue(id, out var vendor))
+                    ordered.Add(vendor);
+            }
+
+            return ordered;
+        }
+
         public async Task<IEnumerable<Vendor>> GetAllAsync()
         {
             return await _context.Vendors.ToListAsync();
diff --git a/SeaHaven.DataServices/Implementation/WorkOrderDataService.cs b/SeaHaven.DataServices/Implementation/WorkOrderDataService.cs
index fe51046..a382d80 100644
--- a/SeaHaven.DataServices/Implementation/WorkOrderDataService.cs
+++ b/SeaHaven.DataServices/Implementation/WorkOrderDataService.cs
@@ -283,6 +283,15 @@ namespace SeaHaven.DataServices.Implementation
             await _context.SaveChangesAsync();
         }
 
+        public async Task AddAuditLogsAsync(IReadOnlyCollection<WorkOrderAuditLog> auditLogs)
+        {
+            if (auditLogs.Count == 0)
+                return;
+
+            await _context.WorkOrderAuditLogs.AddRangeAsync(auditLogs);
+            await _context.SaveChangesAsync();
+        }
+
         public async Task DeleteWorkOrderContactsAsync(int workOrderId)
         {
             var contacts = await _context.WorkOrderContacts
@@ -369,6 +378,31 @@ namespace SeaHaven.DataServices.Implementation
                 .ToListAsync();
         }
 
+        public async Task<IReadOnlyList<WorkOrder>> GetByRequestedIdsWithDetailsAsync(
+            IReadOnlyCollection<int> ids,
+            CancellationToken cancellationToken)
+        {
+            var orderedIds = ids.Distinct().ToList();
+            if (orderedIds.Count == 0)
+                return Array.Empty<WorkOrder>();
+
+            var loaded = await _context.workOrders
+                .AsNoTracking()
+                .Where(w => orderedIds.Contains(w.Id) && w.istemplate != true)
+                .Include(w => w.Locations)
+                .ToListAsync(cancellationToken);
+
+            var byId = loaded.ToDictionary(w => w.Id);
+            var ordered = new List<WorkOrder>(orderedIds.Count);
+            foreach (var id in orderedIds)
+            {
+                if (byId.TryGetValue(id, out var workOrder))
+                    ordered.Add(workOrder);
+            }
+
+            return ordered;
+        }
+
         public async Task<WorkOrderDetailReadModel?> GetWorkOrderDetailAsync(int id)
         {
             return await _context.workOrders
diff --git a/SeaHaven.DataServices/Interfaces/IVendorDataService.cs b/SeaHaven.DataServices/Interfaces/IVendorDataService.cs
index 6bd12f8..3324b6e 100644
--- a/SeaHaven.DataServices/Interfaces/IVendorDataService.cs
+++ b/SeaHaven.DataServices/Interfaces/IVendorDataService.cs
@@ -6,6 +6,10 @@ namespace SeaHaven.DataServices.Interfaces
     {
         Task<Vendor?> GetByIdAsync(int id);
         Task<Vendor?> GetByIdWithDetailsAsync(int id);
+
+        // Batched lookup: one query for the distinct requested ids, preserving input order
+        // and skipping any ids that are not present (no rows returned for missing ids).
+        Task<IReadOnlyList<Vendor>> GetByIdsOrderedAsync(IReadOnlyCollection<int> ids, CancellationToken cancellationToken);
         Task<IEnumerable<Vendor>> GetAllAsync();
         Task<IReadOnlyList<Vendor>> GetActiveVendorsAsync(CancellationToken cancellationToken);
         Task<IReadOnlyList<Vendor>> GetVendorsForFacetsAsync(bool? isActive, CancellationToken cancellationToken);
diff --git a/SeaHaven.DataServices/Interfaces/IWorkOrderDataService.cs b/SeaHaven.DataServices/Interfaces/IWorkOrderDataService.cs
index e298516..3edbd12 100644
--- a/SeaHaven.DataServices/Interfaces/IWorkOrderDataService.cs
+++ b/SeaHaven.DataServices/Interfaces/IWorkOrderDataService.cs
@@ -14,7 +14,7 @@ namespace SeaHaven.DataServices.Interfaces
         Task<IEnumerable<WorkOrder>> GetByAssigneeAsync(string assigneeId);
         Task<IEnumerable<WorkOrder>> GetByStatusAsync(string status);
         Task<IEnumerable<WorkOrder>> GetByPriorityAsync(string priority);
-        
+
         // Paged results
         Task<(IEnumerable<WorkOrder> Items, int TotalCount)> GetPagedAsync(
             int page,
@@ -33,12 +33,12 @@ namespace SeaHaven.DataServices.Interfaces
             int? locationId = null,
             string? sortBy = "lastUpdated",
             string? sortDir = "desc");
-        
+
         // Command operations
         Task<WorkOrder> AddAsync(WorkOrder workOrder);
         Task UpdateAsync(WorkOrder workOrder);
         Task DeleteAsync(int id);
-        
+
         // Related entities - Read
         Task<IEnumerable<WorkOrderContacts>> GetWorkOrderContactsAsync(int workOrderId);
         Task<IEnumerable<WorkOrderCategories>> GetWorkOrderCategoriesAsync(int workOrderId);
@@ -51,6 +51,7 @@ namespace SeaHaven.DataServices.Interfaces
         Task AddWorkOrderCategoriesAsync(int workOrderId, IEnumerable<int> categoryIds);
         Task AddWorkOrderAttachmentAsync(WorkOrderAttachments attachment);
         Task AddAuditLogAsync(WorkOrderAuditLog auditLog);
+        Task AddAuditLogsAsync(IReadOnlyCollection<WorkOrderAuditLog> auditLogs);
 
         // Related entities - Delete
         Task DeleteWorkOrderContactsAsync(int workOrderId);
@@ -71,6 +72,12 @@ namespace SeaHaven.DataServices.Interfaces
         Task<int> CountByLocationAsync(int locationId);
         Task<IEnumerable<WorkOrder>> GetAllWithDetailsAsync();
 
+        // Batched lookup: server-filters the distinct requested ids, excludes templates,
+        // eagerly loads the location detail, deduplicates, and returns results in input order.
+        Task<IReadOnlyList<WorkOrder>> GetByRequestedIdsWithDetailsAsync(
+            IReadOnlyCollection<int> ids,
+            CancellationToken cancellationToken);
+
         // Complex read models
         Task<WorkOrderDetailReadModel?> GetWorkOrderDetailAsync(int id);
         Task<List<WorkOrder>> GetNonTemplateWorkOrdersWithLocationsAsync();
diff --git a/SeaHaven.Services/Configuration/ServiceOptions.cs b/SeaHaven.Services/Configuration/ServiceOptions.cs
new file mode 100644
index 0000000..dad10e0
--- /dev/null
+++ b/SeaHaven.Services/Configuration/ServiceOptions.cs
@@ -0,0 +1,31 @@
+namespace SeaHaven.Services.Configuration;
+
+public sealed class FrontendOptions
+{
+    public string FrontendBaseUrl { get; set; } = string.Empty;
+}
+
+public sealed class JwtOptions
+{
+    public const string SectionName = "JWT";
+
+    public string Secret { get; set; } = string.Empty;
+    public string? ValidIssuer { get; set; }
+    public string? ValidAudience { get; set; }
+}
+
+public sealed class ApprovalsOptions
+{
+    public const string SectionName = "Approvals";
+
+    public decimal? UpliftTier1MaxUsd { get; set; }
+    public string[] Tier1Roles { get; set; } = Array.Empty<string>();
+    public string[] Tier2Roles { get; set; } = Array.Empty<string>();
+}
+
+public sealed class VendorPortalOptions
+{
+    public const string SectionName = "VendorPortal";
+
+    public int? TokenLifetimeDays { get; set; }
+}
diff --git a/SeaHaven.Services/DependencyInjection/ServicesModule.cs b/SeaHaven.Services/DependencyInjection/ServicesModule.cs
index 12673b4..d5fddc2 100644
--- a/SeaHaven.Services/DependencyInjection/ServicesModule.cs
+++ b/SeaHaven.Services/DependencyInjection/ServicesModule.cs
@@ -1,5 +1,7 @@
 using FluentValidation;
+using Microsoft.Extensions.Configuration;
 using Microsoft.Extensions.DependencyInjection;
+using SeaHaven.Services.Configuration;
 using System.Reflection;
 
 namespace SeaHaven.Services.DependencyInjection
@@ -8,8 +10,13 @@ namespace SeaHaven.Services.DependencyInjection
     {
         private static readonly List<Type> ExcludedTypes = new();
 
-        public static IServiceCollection AddBusinessServices(this IServiceCollection services)
+        public static IServiceCollection AddBusinessServices(this IServiceCollection services, IConfiguration configuration)
         {
+            services.Configure<FrontendOptions>(configuration);
+            services.Configure<JwtOptions>(configuration.GetSection(JwtOptions.SectionName));
+            services.Configure<ApprovalsOptions>(configuration.GetSection(ApprovalsOptions.SectionName));
+            services.Configure<VendorPortalOptions>(configuration.GetSection(VendorPortalOptions.SectionName));
+
             var assembly = Assembly.GetExecutingAssembly();
 
             var allClasses = assembly.GetTypes()
diff --git a/SeaHaven.Services/Implementation/AuthenticationService.cs b/SeaHaven.Services/Implementation/AuthenticationService.cs
index 5f4a59e..74c6de8 100644
--- a/SeaHaven.Services/Implementation/AuthenticationService.cs
+++ b/SeaHaven.Services/Implementation/AuthenticationService.cs
@@ -1,8 +1,9 @@
 using Data.SeaHavenIndustries;
 using Microsoft.AspNetCore.Identity;
-using Microsoft.Extensions.Configuration;
+using Microsoft.Extensions.Options;
 using Microsoft.IdentityModel.Tokens;
 using SeaHaven.DataServices.Interfaces;
+using SeaHaven.Services.Configuration;
 using SeaHaven.Services.DTOs;
 using SeaHaven.Services.Interfaces;
 using System.IdentityModel.Tokens.Jwt;
@@ -15,19 +16,19 @@ namespace SeaHaven.Services.Implementation
     public class AuthenticationService : IAuthenticationService
     {
         private readonly UserManager<ApplicationUser> _userManager;
-        private readonly IConfiguration _configuration;
+        private readonly JwtOptions _jwtOptions;
         private readonly IUserDataService _userDataService;
         private readonly IForgetPasswordDataService _forgetPasswordDataService;
         private readonly IEmailSender _emailSender;
         public AuthenticationService(
             UserManager<ApplicationUser> userManager,
-            IConfiguration configuration,
+            IOptions<JwtOptions> jwtOptions,
             IUserDataService userDataService,
             IForgetPasswordDataService forgetPasswordDataService,
             IEmailSender emailSender)
         {
             _userManager = userManager;
-            _configuration = configuration;
+            _jwtOptions = jwtOptions.Value;
             _userDataService = userDataService;
             _forgetPasswordDataService = forgetPasswordDataService;
             _emailSender = emailSender;
@@ -140,10 +141,10 @@ namespace SeaHaven.Services.Implementation
 
         private JwtSecurityToken GetToken(List<Claim> authClaims)
         {
-            var authSigningKey = new SymmetricSecurityKey(Encoding.UTF8.GetBytes(_configuration["JWT:Secret"] ?? ""));
+            var authSigningKey = new SymmetricSecurityKey(Encoding.UTF8.GetBytes(_jwtOptions.Secret));
             var token = new JwtSecurityToken(
-                issuer: _configuration["JWT:ValidIssuer"],
-                audience: _configuration["JWT:ValidAudience"],
+                issuer: _jwtOptions.ValidIssuer,
+                audience: _jwtOptions.ValidAudience,
                 expires: DateTime.Now.AddDays(10),
                 claims: authClaims,
                 signingCredentials: new SigningCredentials(authSigningKey, SecurityAlgorithms.HmacSha256)
diff --git a/SeaHaven.Services/Implementation/UpliftService.cs b/SeaHaven.Services/Implementation/UpliftService.cs
index fa97467..051dd69 100644
--- a/SeaHaven.Services/Implementation/UpliftService.cs
+++ b/SeaHaven.Services/Implementation/UpliftService.cs
@@ -1,6 +1,7 @@
 using Data.SeaHavenIndustries;
-using Microsoft.Extensions.Configuration;
+using Microsoft.Extensions.Options;
 using SeaHaven.DataServices.Interfaces;
+using SeaHaven.Services.Configuration;
 using SeaHaven.Services.DTOs;
 using SeaHaven.Services.Interfaces;
 using System.Security.Claims;
@@ -11,13 +12,13 @@ namespace SeaHaven.Services.Implementation
     {
         private readonly IUpliftDataService _upliftData;
         private readonly IDispatchDataService _dispatchData;
-        private readonly IConfiguration _config;
+        private readonly ApprovalsOptions _approvalsOptions;
 
-        public UpliftService(IUpliftDataService upliftData, IDispatchDataService dispatchData, IConfiguration config)
+        public UpliftService(IUpliftDataService upliftData, IDispatchDataService dispatchData, IOptions<ApprovalsOptions> approvalsOptions)
         {
             _upliftData = upliftData;
             _dispatchData = dispatchData;
-            _config = config;
+            _approvalsOptions = approvalsOptions.Value;
         }
 
         public async Task<UpliftListResultDTO> ListAsync(ClaimsPrincipal user, string? status, int? tier, int page, int pageSize, CancellationToken cancellationToken)
@@ -159,13 +160,19 @@ namespace SeaHaven.Services.Implementation
 
         private bool UserCanApprove(ClaimsPrincipal user, int requiredTier)
         {
-            var key = $"Approvals:Tier{requiredTier}Roles";
-            var roles = _config.GetSection(key).Get<string[]>() ?? Array.Empty<string>();
+            var roles = RolesForTier(requiredTier);
             foreach (var r in roles)
             {
                 if (!string.IsNullOrWhiteSpace(r) && user.IsInRole(r)) return true;
             }
             return false;
         }
+
+        private string[] RolesForTier(int requiredTier) => requiredTier switch
+        {
+            1 => _approvalsOptions.Tier1Roles,
+            2 => _approvalsOptions.Tier2Roles,
+            _ => Array.Empty<string>()
+        };
     }
 }
diff --git a/SeaHaven.Services/Implementation/VendorPortalService.cs b/SeaHaven.Services/Implementation/VendorPortalService.cs
index 66123d7..470eb98 100644
--- a/SeaHaven.Services/Implementation/VendorPortalService.cs
+++ b/SeaHaven.Services/Implementation/VendorPortalService.cs
@@ -1,6 +1,7 @@
 using Data.SeaHavenIndustries;
-using Microsoft.Extensions.Configuration;
+using Microsoft.Extensions.Options;
 using SeaHaven.DataServices.Interfaces;
+using SeaHaven.Services.Configuration;
 using SeaHaven.Services.DTOs;
 using SeaHaven.Services.Interfaces;
 
@@ -14,7 +15,8 @@ namespace SeaHaven.Services.Implementation
         private readonly ICommentDataService _commentData;
         private readonly IUserDataService _userData;
         private readonly IEmailSender _emailSender;
-        private readonly IConfiguration _config;
+        private readonly FrontendOptions _frontendOptions;
+        private readonly ApprovalsOptions _approvalsOptions;
 
         public VendorPortalService(
             IVendorPortalTokenService tokens,
@@ -23,7 +25,8 @@ namespace SeaHaven.Services.Implementation
             ICommentDataService commentData,
             IUserDataService userData,
             IEmailSender emailSender,
-            IConfiguration config)
+            IOptions<FrontendOptions> frontendOptions,
+            IOptions<ApprovalsOptions> approvalsOptions)
         {
             _tokens = tokens;
             _dispatchData = dispatchData;
@@ -31,7 +34,8 @@ namespace SeaHaven.Services.Implementation
             _commentData = commentData;
             _userData = userData;
             _emailSender = emailSender;
-            _config = config;
+            _frontendOptions = frontendOptions.Value;
+            _approvalsOptions = approvalsOptions.Value;
         }
 
         public async Task<VendorPortalSession?> ResolveSessionAsync(string? token, CancellationToken cancellationToken)
@@ -416,7 +420,7 @@ namespace SeaHaven.Services.Implementation
                 throw new InvalidOperationException("A pending uplift request already exists for this dispatch");
             }
 
-            var tier1Max = _config.GetValue<decimal?>("Approvals:UpliftTier1MaxUsd") ?? 2500m;
+            var tier1Max = _approvalsOptions.UpliftTier1MaxUsd ?? 2500m;
             var delta = requestedNTE - current;
             var requiredTier = delta > tier1Max ? 2 : 1;
 
@@ -500,7 +504,7 @@ namespace SeaHaven.Services.Implementation
                 var dispatcherEmail = await _userData.GetEmailByIdAsync(dispatcherUserId, cancellationToken);
                 if (string.IsNullOrWhiteSpace(dispatcherEmail)) return;
 
-                var frontendBase = _config.GetValue<string>("FrontendBaseUrl")?.TrimEnd('/') ?? "";
+                var frontendBase = _frontendOptions.FrontendBaseUrl?.TrimEnd('/') ?? "";
                 var workOrderLink = dispatch.WorkOrderId.HasValue
                     ? $"{frontendBase}/workorders/{dispatch.WorkOrderId.Value}"
                     : frontendBase;
diff --git a/SeaHaven.Services/Implementation/VendorPortalTokenService.cs b/SeaHaven.Services/Implementation/VendorPortalTokenService.cs
index 22a3af5..377b333 100644
--- a/SeaHaven.Services/Implementation/VendorPortalTokenService.cs
+++ b/SeaHaven.Services/Implementation/VendorPortalTokenService.cs
@@ -1,6 +1,7 @@
 using Data.SeaHavenIndustries;
-using Microsoft.Extensions.Configuration;
+using Microsoft.Extensions.Options;
 using SeaHaven.DataServices.Interfaces;
+using SeaHaven.Services.Configuration;
 using SeaHaven.Services.DTOs;
 using SeaHaven.Services.Interfaces;
 using System.Security.Cryptography;
@@ -12,10 +13,10 @@ namespace SeaHaven.Services.Implementation
         private readonly IVendorDataService _vendorDataService;
         private readonly int _lifetimeDays;
 
-        public VendorPortalTokenService(IVendorDataService vendorDataService, IConfiguration config)
+        public VendorPortalTokenService(IVendorDataService vendorDataService, IOptions<VendorPortalOptions> options)
         {
             _vendorDataService = vendorDataService;
-            _lifetimeDays = config.GetValue<int?>("VendorPortal:TokenLifetimeDays") ?? 365;
+            _lifetimeDays = options.Value.TokenLifetimeDays ?? 365;
         }
 
         public async Task<VendorPortalTokenStateDTO> GetOrCreateActiveTokenAsync(int vendorId, CancellationToken cancellationToken)
diff --git a/SeaHaven.Services/Implementation/VendorService.cs b/SeaHaven.Services/Implementation/VendorService.cs
index 871dd17..117b0da 100644
--- a/SeaHaven.Services/Implementation/VendorService.cs
+++ b/SeaHaven.Services/Implementation/VendorService.cs
@@ -2,8 +2,9 @@ using Data.SeaHavenIndustries;
 using Data.SeaHavenIndustries.Enums;
 using FluentValidation;
 using FluentValidation.Results;
-using Microsoft.Extensions.Configuration;
+using Microsoft.Extensions.Options;
 using SeaHaven.DataServices.Interfaces;
+using SeaHaven.Services.Configuration;
 using SeaHaven.Services.DTOs;
 using SeaHaven.Services.Helpers;
 using SeaHaven.Services.Interfaces;
@@ -19,7 +20,7 @@ namespace SeaHaven.Services.Implementation
         private readonly IVendorDataService _vendorDataService;
         private readonly IVendorPortalTokenService _vendorTokenService;
         private readonly IZipCodeDistance _zipDistance;
-        private readonly IConfiguration _config;
+        private readonly FrontendOptions _frontendOptions;
         private readonly ICreateVendorValidation _createValidator;
         private readonly IUpdateVendorValidation _updateValidator;
         private readonly IWorkOrderVendorUpdateValidation _workOrderUpdateValidator;
@@ -28,7 +29,7 @@ namespace SeaHaven.Services.Implementation
             IVendorDataService vendorDataService,
             IVendorPortalTokenService vendorTokenService,
             IZipCodeDistance zipDistance,
-            IConfiguration config,
+            IOptions<FrontendOptions> frontendOptions,
             ICreateVendorValidation createValidator,
             IUpdateVendorValidation updateValidator,
             IWorkOrderVendorUpdateValidation workOrderUpdateValidator)
@@ -36,7 +37,7 @@ namespace SeaHaven.Services.Implementation
             _vendorDataService = vendorDataService;
             _vendorTokenService = vendorTokenService;
             _zipDistance = zipDistance;
-            _config = config;
+            _frontendOptions = frontendOptions.Value;
             _createValidator = createValidator;
             _updateValidator = updateValidator;
             _workOrderUpdateValidator = workOrderUpdateValidator;
@@ -650,7 +651,7 @@ namespace SeaHaven.Services.Implementation
 
         private VendorPortalTokenDTO BuildPortalTokenResponse(VendorPortalTokenStateDTO token)
         {
-            var frontendBase = _config.GetValue<string>("FrontendBaseUrl")?.TrimEnd('/') ?? "";
+            var frontendBase = _frontendOptions.FrontendBaseUrl?.TrimEnd('/') ?? "";
             return new VendorPortalTokenDTO
             {
                 Token = token.Token,
diff --git a/SeaHaven.Services/Implementation/WorkOrderDispatchService.cs b/SeaHaven.Services/Implementation/WorkOrderDispatchService.cs
index 9226c84..1b906a6 100644
--- a/SeaHaven.Services/Implementation/WorkOrderDispatchService.cs
+++ b/SeaHaven.Services/Implementation/WorkOrderDispatchService.cs
@@ -1,8 +1,9 @@
 using Data.SeaHavenIndustries;
 using Data.SeaHavenIndustries.Enums;
-using Microsoft.Extensions.Configuration;
+using Microsoft.Extensions.Options;
 using SeaHaven.DataServices.Interfaces;
 using SeaHaven.DataServices.Models;
+using SeaHaven.Services.Configuration;
 using SeaHaven.Services.DTOs;
 using SeaHaven.Services.Interfaces;
 
@@ -18,7 +19,7 @@ namespace SeaHaven.Services.Implementation
         private readonly ICommentDataService _commentDataService;
         private readonly IDispatchEmailPort _emailPort;
         private readonly IVendorTokenPort _vendorTokenPort;
-        private readonly IConfiguration _configuration;
+        private readonly FrontendOptions _frontendOptions;
 
         public WorkOrderDispatchService(
             IWorkOrderDataService workOrderDataService,
@@ -29,7 +30,7 @@ namespace SeaHaven.Services.Implementation
             ICommentDataService commentDataService,
             IDispatchEmailPort emailPort,
             IVendorTokenPort vendorTokenPort,
-            IConfiguration configuration)
+            IOptions<FrontendOptions> frontendOptions)
         {
             _workOrderDataService = workOrderDataService;
             _dispatchDataService = dispatchDataService;
@@ -39,18 +40,19 @@ namespace SeaHaven.Services.Implementation
             _commentDataService = commentDataService;
             _emailPort = emailPort;
             _vendorTokenPort = vendorTokenPort;
-            _configuration = configuration;
+            _frontendOptions = frontendOptions.Value;
         }
 
         public async Task<DispatchToVendorResult> DispatchToVendorAsync(DispatchToVendorInput input)
         {
-            var allWorkOrders = await _workOrderDataService.GetAllWithDetailsAsync();
-            var workOrders = allWorkOrders.Where(w => input.WorkOrderIds.Contains(w.Id)).ToList();
+            var workOrders = await _workOrderDataService.GetByRequestedIdsWithDetailsAsync(
+                input.WorkOrderIds,
+                CancellationToken.None);
 
             if (workOrders.Count == 0)
                 throw new InvalidOperationException("No work orders found");
 
-            var primaryWO = workOrders.First();
+            var primaryWO = workOrders[0];
 
             var lastPO = await _dispatchDataService.GenerateNextPONumberAsync();
             int nextPO = int.TryParse(lastPO, out var po) ? po : 1;
@@ -61,13 +63,15 @@ namespace SeaHaven.Services.Implementation
             var currentUser = input.UserId != null ? await _userDataService.GetByIdAsync(input.UserId) : null;
             var senderName = currentUser != null ? (currentUser.FirstName + " " + currentUser.LastName).Trim() : "";
 
+            var templateItemTexts = await LoadTemplateItemTextsAsync(input.TaskListTemplateId);
+
+            var distinctVendorIds = input.VendorIds.Distinct().ToList();
+            var vendors = await _vendorDataService.GetByIdsOrderedAsync(distinctVendorIds, CancellationToken.None);
+
             var dispatches = new List<DispatchResultItem>();
 
-            foreach (var vendorId in input.VendorIds)
+            foreach (var vendor in vendors)
             {
-                var vendor = await _vendorDataService.GetByIdAsync(vendorId);
-                if (vendor == null) continue;
-
                 var poNumber = $"VPO-{nextPO:D5}";
                 nextPO++;
                 var dispatchNumber = $"DSP-{nextDSP:D5}";
@@ -78,7 +82,7 @@ namespace SeaHaven.Services.Implementation
                 var dispatch = new Dispatch
                 {
                     WorkOrderId = primaryWO.Id,
-                    VendorId = vendorId,
+                    VendorId = vendor.Id,
                     DispatchNumber = dispatchNumber,
                     PONumber = poNumber,
                     NTEAmount = input.NTEAmount,
@@ -90,22 +94,7 @@ namespace SeaHaven.Services.Implementation
                     DispatchWorkOrders = workOrders.Select(wo => new DispatchWorkOrder { WorkOrderId = wo.Id }).ToList()
                 };
 
-                var checklistItems = new List<DispatchChecklistItem>();
-                if (input.TaskListTemplateId.HasValue)
-                {
-                    var template = await _taskListTemplateDataService.GetByIdWithItemsAsync(input.TaskListTemplateId.Value);
-                    if (template?.Items != null)
-                    {
-                        checklistItems.AddRange(template.Items.OrderBy(i => i.SortOrder).Select((i, idx) =>
-                            new DispatchChecklistItem { ItemText = i.ItemText, SortOrder = idx }));
-                    }
-                }
-                if (input.CustomChecklistItems != null)
-                {
-                    var startIdx = checklistItems.Count;
-                    checklistItems.AddRange(input.CustomChecklistItems.Select((text, idx) =>
-                        new DispatchChecklistItem { ItemText = text, SortOrder = startIdx + idx }));
-                }
+                var checklistItems = BuildChecklistItems(templateItemTexts, input.CustomChecklistItems);
                 dispatch.ChecklistItems = checklistItems;
 
                 var woListHtml = string.Join("", workOrders.Select(wo =>
@@ -120,8 +109,8 @@ namespace SeaHaven.Services.Implementation
                 var descriptionHtml = System.Net.WebUtility.HtmlEncode(input.Description ?? primaryWO.Description ?? "");
                 var senderNameHtml = System.Net.WebUtility.HtmlEncode(senderName);
 
-                var vendorToken = await _vendorTokenPort.GetOrCreateActiveTokenAsync(vendorId);
-                var frontendBase = _configuration.GetValue<string>("FrontendBaseUrl")?.TrimEnd('/') ?? "";
+                var vendorToken = await _vendorTokenPort.GetOrCreateActiveTokenAsync(vendor.Id);
+                var frontendBase = _frontendOptions.FrontendBaseUrl?.TrimEnd('/') ?? "";
                 var portalUrl = $"{frontendBase}/v/{vendorToken}/dashboard";
 
                 var html = $@"
@@ -152,19 +141,17 @@ namespace SeaHaven.Services.Implementation
 
                 var savedDispatch = await _dispatchDataService.AddAsync(dispatch);
 
-                foreach (var wo in workOrders)
+                var auditLogs = workOrders.Select(wo => new WorkOrderAuditLog
                 {
-                    await _workOrderDataService.AddAuditLogAsync(new WorkOrderAuditLog
-                    {
-                        WorkOrderId = wo.Id,
-                        UserId = input.UserId,
-                        FieldName = "Dispatch",
-                        OldValue = "",
-                        NewValue = $"{vendor.CompanyName} ({dispatchNumber})",
-                        Action = AuditAction.Dispatch.ToString(),
-                        CreatedAt = DateTime.UtcNow
-                    });
-                }
+                    WorkOrderId = wo.Id,
+                    UserId = input.UserId,
+                    FieldName = "Dispatch",
+                    OldValue = "",
+                    NewValue = $"{vendor.CompanyName} ({dispatchNumber})",
+                    Action = AuditAction.Dispatch.ToString(),
+                    CreatedAt = DateTime.UtcNow
+                }).ToList();
+                await _workOrderDataService.AddAuditLogsAsync(auditLogs);
 
                 dispatches.Add(new DispatchResultItem
                 {
@@ -180,6 +167,41 @@ namespace SeaHaven.Services.Implementation
             return new DispatchToVendorResult { Message = "Dispatched", Dispatches = dispatches };
         }
 
+        private async Task<List<string?>?> LoadTemplateItemTextsAsync(int? taskListTemplateId)
+        {
+            if (!taskListTemplateId.HasValue)
+                return null;
+
+            var template = await _taskListTemplateDataService.GetByIdWithItemsAsync(taskListTemplateId.Value);
+            if (template?.Items == null)
+                return null;
+
+            return template.Items
+                .OrderBy(i => i.SortOrder)
+                .Select(i => i.ItemText)
+                .ToList();
+        }
+
+        private static List<DispatchChecklistItem> BuildChecklistItems(List<string?>? templateItemTexts, List<string>? customChecklistItems)
+        {
+            var checklistItems = new List<DispatchChecklistItem>();
+
+            if (templateItemTexts != null)
+            {
+                checklistItems.AddRange(templateItemTexts.Select((text, idx) =>
+                    new DispatchChecklistItem { ItemText = text, SortOrder = idx }));
+            }
+
+            if (customChecklistItems != null)
+            {
+                var startIdx = checklistItems.Count;
+                checklistItems.AddRange(customChecklistItems.Select((text, idx) =>
+                    new DispatchChecklistItem { ItemText = text, SortOrder = startIdx + idx }));
+            }
+
+            return checklistItems;
+        }
+
         public async Task<IEnumerable<DispatchReadModel>> GetDispatchesAsync(int workOrderId)
         {
             var dispatches = await _dispatchDataService.GetByWorkOrderIdAsync(workOrderId);