fix(watch): 添加设备时校验watchNo唯一性，避免数据库唯一约束冲突

health-watch/health-watch-biz/src/main/java/com/renkang/watch/controller/WatchDeviceController.java

@@ -295,6 +295,12 @@ public class WatchDeviceController extends JeecgController<WatchDevice, IWatchDe
     @RequiresPermissions("watch:watch_device:add")
     @PostMapping(value = "/add")
     public Result<String> add(@RequestBody WatchDevice watchDevice) {
+        // 校验设备编码是否已存在
+        LambdaQueryWrapper<WatchDevice> queryWrapper = new LambdaQueryWrapper<>();
+        queryWrapper.eq(WatchDevice::getWatchNo, watchDevice.getWatchNo());
+        if (watchDeviceService.count(queryWrapper) > 0) {
+            return Result.error("设备编码已存在，请勿重复添加");
+        }
         // 删除开关
         LambdaUpdateWrapper<WatchDeviceSwitch> updateWrapper = new LambdaUpdateWrapper<>();
         updateWrapper.eq(WatchDeviceSwitch::getWatchNo, watchDevice.getWatchNo());