fix(dms): 优化保养工单完成逻辑

- 在完成保养工单时增加状态检查，确保只有在保养中状态才能完成保养
- 修复了可能导致非保养中状态也能完成保养的逻辑漏洞

ruoyi-modules/hwmom-dms/src/main/java/org/dromara/dms/service/impl/DmsBillsMaintInstanceServiceImpl.java

@@ -521,6 +521,9 @@ public class DmsBillsMaintInstanceServiceImpl implements IDmsBillsMaintInstanceS
     @Override
     @GlobalTransactional(rollbackFor = Exception.class)
     public int completeMaint(DmsBillsMaintDetail dmsBillsMaintDetail) {
+        if(!dmsBillsMaintDetail.getMaintStatus().equals(DmsConstants.DMS_BILLS_MAINT_INSTANCE_STATUS_MAINTING)){
+            throw new ServiceException("非保养中状态，不能完成保养");
+        }
         // 获取保养工单明细中的项目列表
         List<DmsBillsMaintDetailProjectVo> dmsBillsMaintDetailProjects = dmsBillsMaintDetail.getDmsBillsMaintDetailProjectList();
         // 获取保养实例ID