implement wagon maintenance feature: add functionality to detach wagons and move them to maintenance status

apps/edr-freight-api/src/modules/trains/train-builder.controller.ts

@@ -85,6 +85,16 @@ export class TrainBuilderController {
     return this.trainBuilderService.removeWagon(id, wagonId);
   }
 
+  @Post(':id/wagons/:wagonId/maintenance')
+  @FleetManage()
+  @ApiOperation({ summary: 'Detach one wagon and move it to MAINTENANCE status' })
+  sendWagonToMaintenance(
+    @Param('id', ParseUUIDPipe) id: string,
+    @Param('wagonId', ParseUUIDPipe) wagonId: string,
+  ) {
+    return this.trainBuilderService.sendWagonToMaintenance(id, wagonId);
+  }
+
   @Post(':id/reorder-wagons')
   @FleetManage()
   @ApiOperation({ summary: 'Persist a drag-reorder of the full consist' })