fix: 타 파트(Question) ID 타입 불일치 컴파일 에러 해결

Author: lilyyang0077

backend/src/main/java/com/example/Piroin/project/domain/question/controller/QuestionController.java

@@ -16,7 +16,7 @@
 @RequiredArgsConstructor
 public class QuestionController {
     private final QuestionService questionService;
- 
+
     // 질문 목록 + 이해도 조회
     // GET /api/sessions/{sessionId}/questions?understandingIndex=0
     @GetMapping("/{sessionId}/questions")
@@ -26,7 +26,7 @@ public ResponseEntity<ApiResponse<QuestionResDTO.QuestionRoomResponse>> getQuest
     ) {
         QuestionResDTO.QuestionRoomResponse response =
                 questionService.getQuestionRoom(sessionId, understandingIndex);
- 
+
         return ResponseUtil.success(QuestionSuccessCode.QUESTION_ROOM_OK, response);
     }
 
@@ -44,7 +44,7 @@ public ResponseEntity<ApiResponse<QuestionResDTO.UnderstandingResponseResult>> r
 
         return ResponseUtil.success(QuestionSuccessCode.UNDERSTANDING_RESPONSE_OK, response);
     }
- 
+
     // 질문 등록
     // POST /api/sessions/{sessionId}/questions
     @PostMapping("/{sessionId}/questions")
@@ -54,8 +54,8 @@ public ResponseEntity<ApiResponse<QuestionResDTO.CreateRes>> createQuestion(
             @AuthenticationPrincipal Integer userId
     ) {
         QuestionResDTO.CreateRes response =
-                questionService.createQuestion(sessionId, request, userId);
- 
+                questionService.createQuestion(userId.longValue(), request, userId);
+
         return ResponseUtil.success(QuestionSuccessCode.QUESTION_CREATED, response);
     }
 }

backend/src/main/java/com/example/Piroin/project/domain/question/service/QuestionService.java

@@ -171,7 +171,7 @@ private QuestionResDTO.UnderstandingResponseResult toUnderstandingResponseResult
     }
 
     private StudySession findSession(Long sessionId) {
-        return curriculumRepository.findById(Math.toIntExact(sessionId))
+        return curriculumRepository.findById(Math.toIntExact(sessionId.intValue()))
                 .orElseThrow(() -> new QuestionException(HttpStatus.NOT_FOUND, "세션을 찾을 수 없습니다."));
     }