[Feat]: 데이터베이스 제약조건 예외 추가

Author: shihan00321

back/src/main/java/com/back/global/exception/GlobalExceptionHandler.java

@@ -11,6 +11,7 @@
 import jakarta.validation.ConstraintViolationException;
 import lombok.extern.slf4j.Slf4j;
 import org.slf4j.MDC;
+import org.springframework.dao.DataIntegrityViolationException;
 import org.springframework.http.HttpStatus;
 import org.springframework.http.ProblemDetail;
 import org.springframework.http.converter.HttpMessageNotReadableException;
@@ -149,4 +150,17 @@ public ProblemDetail handleAccessDenied(AccessDeniedException ex, HttpServletReq
                 req
         );
     }
+
+    @ExceptionHandler(DataIntegrityViolationException.class)
+    public ProblemDetail handleDataIntegrityViolation(DataIntegrityViolationException ex, HttpServletRequest req) {
+        String userMessage = "요청을 처리할 수 없습니다.";
+        return ProblemDetails.of(
+                HttpStatus.BAD_REQUEST,
+                "DATA_INTEGRITY_VIOLATION",
+                userMessage,
+                "DATA_INTEGRITY_VIOLATION",
+                Map.of(),
+                req
+        );
+    }
 }