chore(warehouse): comprehensive demo seeder — populate every queue coherently

WarehouseDemoSeeder creates one coherent WH-DEMO-* dataset so every tab shows data:
- Export Receive (3 PAID export bookings, no inventory)
- Export Ready To Load (3 READY_FOR_LOADING + PASSED)
- Export Loaded/Dispatch (2 LOADED)
- Import Arrive (1 ARRIVED Djibouti→Ethiopia train, 3 IN_TRANSIT bookings)
- Import Unloaded (3 UNLOADED)
- Import Dispatch (3 READY_FOR_PICKUP + PASSED)

Idempotent (sentinel WH-DEMO-RCV-1); dedicated refs so it never collides with SEED-* data.
Verified: all queues populated, dashboard shows 19 items across all 7 statuses.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

apps/edr-freight-api/src/app.module.ts

@@ -52,6 +52,7 @@ import { Batch14TestDataSeeder } from "./seed/batch1-4-test-data.seeder";
 import { Batch5TestDataSeeder } from "./seed/batch5-test-data.seeder";
 import { Batch7TestDataSeeder } from "./seed/batch7-test-data.seeder";
 import { Batch8TestDataSeeder } from "./seed/batch8-test-data.seeder";
+import { WarehouseDemoSeeder } from "./seed/warehouse-demo.seeder";
 import { FreightPermissionKeyMigrationSeeder } from "./seed/freight-permission-key-migration.seeder";
 import { DemoFreightDataSeeder } from "./seed/demo-freight-data.seeder";
 //New Trains, Wagons, Container and Cargo management modules
@@ -137,6 +138,7 @@ import { OverviewModule } from './modules/overview/overview.module';
     Batch5TestDataSeeder,
     Batch7TestDataSeeder,
     Batch8TestDataSeeder,
+    WarehouseDemoSeeder,
   ],
 })
 export class AppModule implements OnApplicationBootstrap {
@@ -153,6 +155,7 @@ export class AppModule implements OnApplicationBootstrap {
     private readonly batch5TestDataSeeder: Batch5TestDataSeeder,
     private readonly batch7TestDataSeeder: Batch7TestDataSeeder,
     private readonly batch8TestDataSeeder: Batch8TestDataSeeder,
+    private readonly warehouseDemoSeeder: WarehouseDemoSeeder,
     private readonly freightPermissionKeyMigrationSeeder: FreightPermissionKeyMigrationSeeder,
     private readonly demoFreightDataSeeder: DemoFreightDataSeeder,
   ) { }
@@ -171,6 +174,7 @@ export class AppModule implements OnApplicationBootstrap {
     await this.batch5TestDataSeeder.run();
     await this.batch7TestDataSeeder.run();
     await this.batch8TestDataSeeder.run();
+    await this.warehouseDemoSeeder.run();
     // Idempotent demo data: ≥100 wagons/type, approval chains, 4 staff users.
     // Each block self-guards on an empty-table check, so this is safe every boot.
     await this.demoFreightDataSeeder.run();