支持数据一键导出和导入

[cnaron]

Is your feature request related to a problem?

之前在本地部署了，数据都在电脑里。现在转到线上部署，想让数据同步过来

Describe the solution you'd like

支持一键导出全部数据，然后也支持历史数据一键导入，这样方便备份和提取

Additional context

No response

[Issues-translate-bot]

Issue is not in English. It has been translated automatically.

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Title: Support one-click export and import of data

[Wxinfeng]

How to implement data backup and data export.

[gotname]

The function of importing and exporting this data is very important！！！！！！！！！！

[wayner6]

I hope you can support exporting data by cloud or webdav and syncing automatically, thanks 😍😍😍

[Zeng1998]

Discuss in #778 .