fix wagon cncellation

apps/edr-freight-api/src/modules/bookings/dto/wagon-cancellation.dto.ts

@@ -9,6 +9,7 @@ import {
   IsNumber,
   IsOptional,
   IsString,
+  IsUUID,
   MaxLength,
   Min,
   ValidateNested,
@@ -28,6 +29,18 @@ export class CancelContainerLineDto {
 }
 
 export class RequestWagonCancellationDto {
+  @ApiPropertyOptional({
+    description:
+      'Cancel SPECIFIC allocated wagons: wagon_booking_allocation ids from GET /bookings/:id/wagons. ' +
+      'When set, wagons/containers are derived from the selected wagons and the other fields are ignored.',
+    type: [String],
+  })
+  @IsOptional()
+  @IsArray()
+  @ArrayNotEmpty()
+  @IsUUID('4', { each: true })
+  wagonAllocationIds?: string[];
+
   @ApiPropertyOptional({
     description: 'BULK bookings: number of wagons to cancel (tons derived proportionally)',
   })