라벨링 툴 라벨러,검수자 저장 후 status 리턴하기

src/main/java/com/kamco/cd/kamcoback/trainingdata/TrainingDataLabelApiController.java

@@ -88,9 +88,9 @@ public class TrainingDataLabelApiController {
         @ApiResponse(responseCode = "500", description = "서버 오류", content = @Content)
       })
   @PostMapping
-  public ApiResponseDto<ResponseObj> saveLabelingFeature(
+  public ApiResponseDto<String> saveLabelingFeature(
       @RequestBody TrainingDataLabelDto.LabelFeatureRequest request) {
-    return ApiResponseDto.okObject(trainingDataLabelService.saveLabelingFeature(request));
+    return ApiResponseDto.ok(trainingDataLabelService.saveLabelingFeature(request));
   }
 
   @Operation(summary = "작업 통계 조회", description = "라벨러의 작업 현황 통계를 조회합니다. (전체/미작업/Today 건수)")