Add train deactivation feature and import train number management

- Introduced DEACTIVATED status for trains, allowing staff to park trains indefinitely.
- Implemented methods to deactivate and reactivate trains in the TrainBuilderService.
- Added UI components for train deactivation and reactivation in TrainBuilderDetailPage.
- Created a dropdown setting for admin-managed import train numbers, with corresponding migrations.
- Updated yard code length to accommodate soft-delete suffix.
- Enhanced train status handling to include DEACTIVATED state.

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

@@ -1283,7 +1283,8 @@ export class TrainSchedulingService {
       }
       if (
         builtTrain.status === Freight.TrainStatus.OutOfService ||
-        builtTrain.status === Freight.TrainStatus.UnderMaintenance
+        builtTrain.status === Freight.TrainStatus.UnderMaintenance ||
+        builtTrain.status === Freight.TrainStatus.Deactivated
       ) {
         throw new ConflictException(
           `Train ${builtTrain.code} is ${builtTrain.status.toLowerCase().replace(/_/g, ' ')}`,
@@ -5219,7 +5220,11 @@ export class TrainSchedulingService {
     const trains = await this.dataSource.getRepository(Train).find({
       where: {
         status: Not(
-          In([Freight.TrainStatus.OutOfService, Freight.TrainStatus.UnderMaintenance]),
+          In([
+            Freight.TrainStatus.OutOfService,
+            Freight.TrainStatus.UnderMaintenance,
+            Freight.TrainStatus.Deactivated,
+          ]),
         ),
       },
       relations: {
@@ -5619,8 +5624,8 @@ export class TrainSchedulingService {
    * Re-derive a built train's lifecycle status from its schedules after one of
    * them changes: any DISPATCHED schedule → IN_SERVICE; any DRAFT/SCHEDULED →
    * SCHEDULED; otherwise AVAILABLE. `moveToYardId` relocates the train (arrival
-   * at destination). Manually parked trains (UNDER_MAINTENANCE / OUT_OF_SERVICE)
-   * keep their status — staff own that flag, not the scheduler.
+   * at destination). Manually parked trains (UNDER_MAINTENANCE / OUT_OF_SERVICE
+   * / DEACTIVATED) keep their status — staff own that flag, not the scheduler.
    */
   private async syncBuiltTrainAfterScheduleChange(
     manager: EntityManager,