refactor(cdk): encrypt migrated log groups with seahaven-logs CMK (INFRA-114)

cdk/po_stack.py

@@ -118,6 +118,18 @@ class PoIngestStack(Stack):
             ),
         )
 
+        # --- Shared customer-managed CMK for CloudWatch log encryption ---
+        # alias/seahaven-logs. The po-email-processor log group was already
+        # associated with this CMK out-of-band; declaring encryption_key on the
+        # migrated LogGroups below reconciles that drift and hardens the remaining
+        # groups (INFRA-114, per cross-review). The key policy already permits
+        # logs.us-east-1.amazonaws.com (verified in use on po-email-processor).
+        logs_cmk = kms.Key.from_key_arn(
+            self,
+            "LogsKey",
+            "arn:aws:kms:us-east-1:328440206208:key/b748750c-3b26-478d-acfb-d0126cc97f56",
+        )
+
         # --- Purchase-orders DynamoDB table ---
         # Owned by this stack. Streams enabled for the site-extractor pipeline.
         # Other stacks (seahaven-slack-bot) reference this table via fromTableName().
@@ -169,6 +181,7 @@ class PoIngestStack(Stack):
             "EmailProcessorLogGroup",
             log_group_name="/aws/lambda/po-email-processor",
             retention=logs.RetentionDays.TWO_MONTHS,
+            encryption_key=logs_cmk,
             removal_policy=RemovalPolicy.RETAIN,
         )
 
@@ -317,6 +330,7 @@ class PoIngestStack(Stack):
             "WebUILogGroup",
             log_group_name="/aws/lambda/po-web-ui",
             retention=logs.RetentionDays.TWO_MONTHS,
+            encryption_key=logs_cmk,
             removal_policy=RemovalPolicy.RETAIN,
         )
 
@@ -397,6 +411,7 @@ class PoIngestStack(Stack):
             "SiteExtractorLogGroup",
             log_group_name="/aws/lambda/po-ingest-site-extractor",
             retention=logs.RetentionDays.TWO_MONTHS,
+            encryption_key=logs_cmk,
             removal_policy=RemovalPolicy.RETAIN,
         )
 

cdk/wo_stack.py

@@ -156,6 +156,17 @@ class WorkorderIngestStack(Stack):
             enforce_ssl=True,
         )
 
+        # --- Shared customer-managed CMK for CloudWatch log encryption ---
+        # alias/seahaven-logs. Same CMK the po-email-processor log group was
+        # already associated with out-of-band; declaring encryption_key on the
+        # migrated LogGroups below hardens these groups (INFRA-114, per
+        # cross-review). The key policy already permits logs.us-east-1.amazonaws.com.
+        logs_cmk = kms.Key.from_key_arn(
+            self,
+            "LogsKey",
+            "arn:aws:kms:us-east-1:328440206208:key/b748750c-3b26-478d-acfb-d0126cc97f56",
+        )
+
         # --- Explicit log group (INFRA-114) ---
         # Replaces the deprecated log_retention prop, which provisioned a
         # LogRetention custom resource whose role held logs:PutRetentionPolicy/
@@ -168,6 +179,7 @@ class WorkorderIngestStack(Stack):
             "EmailProcessorLogGroup",
             log_group_name="/aws/lambda/workorder-email-processor",
             retention=logs.RetentionDays.TWO_MONTHS,
+            encryption_key=logs_cmk,
             removal_policy=RemovalPolicy.RETAIN,
         )
 
@@ -331,6 +343,7 @@ class WorkorderIngestStack(Stack):
             "WebUILogGroup",
             log_group_name="/aws/lambda/workorder-web-ui",
             retention=logs.RetentionDays.TWO_MONTHS,
+            encryption_key=logs_cmk,
             removal_policy=RemovalPolicy.RETAIN,
         )