add export/inport number

apps/edr-freight-api/src/modules/wagons/dto/create-wagon.dto.ts

@@ -20,6 +20,16 @@ export class CreateWagonDto {
   // Tare weight and payload capacity are not accepted here: they belong to the
   // wagon type and are resolved through wagonTypeId.
 
+  /** EXPORT run number — odd, Ethiopia → Djibouti (e.g. 8001). */
+  @IsOptional()
+  @IsString()
+  exportTrainNumber?: string;
+
+  /** IMPORT run number — even, Djibouti → Ethiopia (e.g. 8002). */
+  @IsOptional()
+  @IsString()
+  importTrainNumber?: string;
+
   @IsOptional()
   @IsEnum(WagonStatus)
   status?: WagonStatus;