fix: CommUtil.isNotEmptyOrNull → !CommUtil.isEmptyOrNull 编译错误修复

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

car-wash-service/src/main/java/com/kym/service/impl/MpRelationServiceImpl.java

@@ -89,7 +89,7 @@ public class MpRelationServiceImpl extends MyBaseServiceImpl<MpRelationMapper, M
         }
         // 同步关注状态到 t_user（兜底事件丢失场景）
         var allRelations = lambdaQuery().isNotNull(MpRelation::getUserId).list();
-        if (CommUtil.isNotEmptyOrNull(allRelations)) {
+        if (!CommUtil.isEmptyOrNull(allRelations)) {
             var subscribedIds = allRelations.stream()
                     .filter(MpRelation::getSubscribe)
                     .map(MpRelation::getUserId).toList();