解析错误码时，若无业务码则返回服务码

v2alpha/public.go

@@ -97,7 +97,7 @@ func ParseCode(err error) *withCode {
 			cause:        nil,
 			Msg:          err.Error(),
 			HttpCode:     defaultErrCode.HttpCode,
-			BusinessCode: defaultErrCode.BusinessCode,
+			BusinessCode: serviceCode * 10000,
 		}
 	}