fix: checkstyle (#588)

Author: GuoHao

server/src/main/java/run/ikaros/server/store/repository/AttachmentReferenceRepository.java

@@ -19,13 +19,15 @@ Mono<Boolean> existsByTypeAndReferenceId(
         AttachmentRelationType type, Long referenceId
     );
 
+    Mono<Boolean> existsByTypeAndReferenceId(AttachmentReferenceType type, Long referenceId);
+
     Mono<Boolean> existsByAttachmentId(Long attachmentId);
 
+
     Mono<AttachmentReferenceEntity> findByTypeAndAttachmentIdAndReferenceId(
         AttachmentReferenceType type, Long attachmentId, Long referenceId
     );
 
-    Mono<Boolean> existsByTypeAndReferenceId(AttachmentReferenceType type, Long referenceId);
 
     Flux<AttachmentReferenceEntity> findAllByTypeAndReferenceId(AttachmentReferenceType type,
                                                                 Long referenceId);