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 })

apps/edr-freight-api/src/modules/rule-engine/services/yards.service.ts

@@ -31,7 +31,7 @@ export class YardsService {
 
   /** Create a yard. */
   async create(dto: CreateYardDto): Promise<Yard> {
-    const code = generateCode(dto.label);
+    const code = generateCode(dto.label).slice(0, 40);
     const existing = await this.repository.findByCode(code);
     if (existing) throw new ConflictException(`Yard with label "${dto.label}" conflicts with existing code "${code}"`);
 
@@ -58,9 +58,19 @@ export class YardsService {
     return updated;
   }
 
-  /** Soft-delete a yard. */
+  /**
+   * Soft-delete a yard. The unique `code` (and the label) get a `@<epoch-ms>`
+   * suffix first — e.g. SEBETA → SEBETA@1755612345678 — so a new yard with the
+   * same name can be created later without tripping UQ_yards_code, which spans
+   * soft-deleted rows too.
+   */
   async remove(id: string): Promise<void> {
-    await this.findById(id);
+    const yard = await this.findById(id);
+    const suffix = `@${Date.now()}`;
+    await this.repository.update(id, {
+      code: `${yard.code.slice(0, 40 - suffix.length)}${suffix}`,
+      label: `${yard.label.slice(0, 100 - suffix.length)}${suffix}`,
+    });
     await this.repository.softDelete(id);
   }