feat: 新增业务字段路径读写工具

新增 TakeBusinessFields、WriteBusinessFields、SetByPath 与 GetByPath 等工具，支持按映射路径写入请求体与解析响应，并更新相关依赖。

service/task/task_service.go

@@ -227,7 +227,7 @@ func (s *taskService) ModelTaskCallback(ctx context.Context, req *dto.ModelTaskC
 
 	// 3. 失败/过期
 	if req.Status == "failed" || req.Status == "expired" {
-		NotifyAsyncResult(req.TaskID, nil, fmt.Errorf(req.Status))
+		NotifyAsyncResult(req.TaskID, nil, fmt.Errorf("%s", req.Status))
 		return &dto.ModelTaskCallbackRes{Success: true}, nil
 	}