Looks nice but seems overkill to me to run a Go server to sync with a telegram bot to authenticate. Maybe I don't fully understand the use case.

I added a table with all possible setup options: https://github.com/zakirullin/files.md#ways-to-use-it

You'll right on this - I'll cover this in great detail.

You don't need to spin up the server, only in case you want your own infra.

Optional sync is only working with chatbot auth for now, but I'll do something about it.