- DispatchWorkOrder junction table for 1:N dispatch-to-WO relationship
- Make Dispatch.WorkOrderId nullable (backward compat)
- Add AcceptToken and AcknowledgedAt to Dispatch model
- Dispatch_DTO accepts WorkOrderIds array
- DispatchToVendor creates junction rows, email lists all WOs in table
- GetDispatches queries both junction table and direct FK
- GetDispatchById includes workOrders list from junction table
- Migration with DispatchWorkOrder table
