fix(hikiot): 添加人脸照片 URL 校验异常处理

- 在 addFace 方法中添加对 URL 为空或无效的判断
- 抛出异常提示用户重新上传人脸照片
- 防止传入无效的照片 URL 导致后续处理出错

national-motion-module-system/national-motion-system-biz/src/main/java/org/jeecg/modules/hikiot/HikiotTool.java

@@ -291,6 +291,7 @@ public class HikiotTool {
      * @Date 14:28 2025/8/15
      **/
     public static String addFace(String deviceSerial,String employeeNo,String url){
+        if(url == null || url.isEmpty() || url.equals("null") || url.equals("")) throw new RuntimeException("请重新上传人脸照片！");
         AddFaceRequestDTO addFaceRequestDTO = new AddFaceRequestDTO();
         addFaceRequestDTO.setDeviceSerial(deviceSerial);
         addFaceRequestDTO.setPayload(new AddFaceRequestDTO.Payload()