feat(train-scheduling): notify customer of CAS on direct-to-train load

Direct truck-to-train export cargo skips the warehouse, so the existing
carriage acceptance sheet ready notice (fired on warehouse receive)
never reached these bookings. Their handover moment is the load itself.

Extract notifyCarriageAcceptanceReady into a shared notifications util
(was private to WarehouseInventoryService) and call it from
BookingJourneyService.loadBooking for EXPORT + DIRECT_TO_TRAIN bookings,
right after the GRN gate, before the load transaction proceeds.

apps/edr-freight-api/src/modules/train-scheduling/booking-journey.service.spec.ts

@@ -11,6 +11,8 @@ describe('BookingJourneyService.autoPlaceOnFreedWagons', () => {
     {} as never, // yardFacilities
     {} as never, // facilityHandling
     { emit: jest.fn() } as never, // events
+    {} as never, // notifications
+    {} as never, // inbox
   );
 
   const schedule = { id: 'sched-1', trainSetId: 'ts-1' };

apps/edr-freight-api/src/modules/train-scheduling/booking-journey.service.ts

@@ -24,7 +24,10 @@ import { WagonBookingAllocation } from '../train-schedules/entities/wagon-bookin
 import { Wagon } from '../wagons/entities/wagon.entity';
 import { WagonMovement } from '../wagons/entities/wagon-movement.entity';
 import { TrainCheckpointEvent } from './entities/train-checkpoint-event.entity';
-import { assertExportReceivedWithGrn } from '../../common/export-received-gate';
+import { assertExportReceivedWithGrn, DIRECT_TO_TRAIN } from '../../common/export-received-gate';
+import { NotificationsService } from '../notifications/notifications.service';
+import { NotificationInboxService } from '../notification-inbox/notification-inbox.service';
+import { notifyCarriageAcceptanceReady } from '../notifications/notify-company.util';
 
 /**
  * Per-booking journey along a train's corridor — for EVERY trade direction.
@@ -52,6 +55,8 @@ export class BookingJourneyService {
     private readonly yardFacilities: YardFacilitiesService,
     private readonly facilityHandling: FacilityHandlingService,
     private readonly events: EventEmitter2,
+    private readonly notifications: NotificationsService,
+    private readonly inbox: NotificationInboxService,
     @Optional() private readonly milestoneService?: ClearanceMilestoneService,
   ) {}
 
@@ -76,6 +81,21 @@ export class BookingJourneyService {
     // Export cargo must be in the warehouse with a GRN before it can be loaded,
     // however it arrived and whatever it is allocated to.
     await assertExportReceivedWithGrn(this.dataSource, booking);
+    // Direct truck-to-train cargo never sees the warehouse, so loading IS its
+    // handover moment — the carriage acceptance sheet must go out to the
+    // customer right here, not on a receive event that will never fire.
+    if (
+      booking.tradeDirection === 'EXPORT' &&
+      booking.exportHandoverMode === DIRECT_TO_TRAIN
+    ) {
+      await notifyCarriageAcceptanceReady(
+        this.dataSource,
+        this.notifications,
+        this.inbox,
+        booking.id,
+        this.logger,
+      );
+    }
 
     const now = new Date();
     await this.dataSource.transaction(async (manager) => {