Zing22

Update serviceaccount field in sample complete.xml

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The field `` seems like having a different structure, which not contains `domain` and `user`, but only a `username`.

**问题** 1. 消息通知模板标题不合适（例如“拒绝理由”的内容可能是“已收录x张照片” 2. 内容字数过长，导致某些模板字段为`phrase`的模板调用会报错 **解决思路** 1. 优化通知内容，与标题匹配起来 2. 尽量缩短字数 **修改路径** 云函数：sendMsgV2中的调用，以及内容拼接

[Feature] Adding special information for function invoking by backend triggers.

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### Search before asking - [X] I had searched in the [issues](https://github.com/labring/laf/issues?q=is%3Aissue) and found no similar issues. ### Feature Request I have a `__interceptor__` function to check signature from front-end...