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/rule-engine/entities/yard.entity.ts

@@ -7,7 +7,8 @@ import { Column, Entity, Index } from 'typeorm';
 @Index(['country'])
 @Index(['isActive'])
 export class Yard extends BaseEntity {
-  @Column({ name: 'code', type: 'varchar', length: 20, unique: true })
+  // 40 leaves room for the `@<epoch-ms>` suffix soft-delete appends to free the code.
+  @Column({ name: 'code', type: 'varchar', length: 40, unique: true })
   code!: string;
 
   @Column({ name: 'label', type: 'varchar', length: 100 })