feat: HttpMessageNotReadableException 핸들러 작성

src/main/java/com/j9/bestmoments/exception/GlobalExceptionHandler.java

@@ -5,6 +5,7 @@
 import org.springframework.context.support.DefaultMessageSourceResolvable;
 import org.springframework.http.HttpStatus;
 import org.springframework.http.ResponseEntity;
+import org.springframework.http.converter.HttpMessageNotReadableException;
 import org.springframework.web.bind.MethodArgumentNotValidException;
 import org.springframework.web.bind.annotation.ControllerAdvice;
 import org.springframework.web.bind.annotation.ExceptionHandler;
@@ -27,4 +28,10 @@ protected ResponseEntity<String> handleMethodArgumentNotValidException(MethodArg
         return ResponseEntity.status(HttpStatus.BAD_REQUEST).body(msg);
     }
 
+    // 잘못된 형식, 매핑 실패, 필드 누락
+    @ExceptionHandler(HttpMessageNotReadableException.class)
+    protected ResponseEntity<String> handleHttpMessageNotReadableException(HttpMessageNotReadableException e) {
+        return ResponseEntity.status(HttpStatus.BAD_REQUEST).body(null);
+    }
+
 }