feat: Objectoptimisticlockingfailureexception 핸들러 추가 (#1073)

* feat: 낙관적 락 충돌 예외 핸들러 추가

* chore: 에러 코드 변경

* chore: 에러 메시지 변경

src/main/java/in/koreatech/koin/global/exception/GlobalExceptionHandler.java

@@ -13,6 +13,7 @@
 import org.springframework.http.HttpStatus;
 import org.springframework.http.HttpStatusCode;
 import org.springframework.http.ResponseEntity;
+import org.springframework.orm.ObjectOptimisticLockingFailureException;
 import org.springframework.web.bind.MethodArgumentNotValidException;
 import org.springframework.web.bind.annotation.ExceptionHandler;
 import org.springframework.web.bind.annotation.RestControllerAdvice;
@@ -188,6 +189,16 @@ public ResponseEntity<Object> handleNoHandlerFoundException(
         return buildErrorResponse(HttpStatus.NOT_FOUND, "유효하지 않은 API 경로입니다.");
     }
 
+    @ExceptionHandler(ObjectOptimisticLockingFailureException.class)
+    public ResponseEntity<Object> handleOptimisticLockException(
+        HttpServletRequest request,
+        ObjectOptimisticLockingFailureException e
+    ) {
+        log.warn(e.getMessage());
+        requestLogging(((ServletWebRequest)request).getRequest());
+        return buildErrorResponse(HttpStatus.CONFLICT, "이미 처리된 요청입니다.");
+    }
+
     @ExceptionHandler(Exception.class)
     public ResponseEntity<Object> handleException(
         HttpServletRequest request,