I see why automatically giving them out (like in ACME) would be a bad idea, but other than that, why not? Even https://1.1.1.1 has a DigiCert cert.

There are more reasons, as LetsEncrypt might be more restrictive on what you can get (for example, you cant get a certificate for an IP address from them). But, as 99.99% of usecases do not require anything like that, go with letsencrypt until you know of a reason not to.

Note that Git doesnt store deltas. It will reuse unchanged files, but stores a (compressed) version of every file that has existed in the whole history, under its SHA1 hash.

What should it do instead? I think the only reasonable action would be not showing it if the licence file was changed.

Is this post about Github seemingly detecting an incorrect licence? The project was relicenced in a later commit, so I dont think this behavior is entirely wrong.

mautrix/telegram is a bridge between Matrix and Telegram. It mostly lets users of Matrix contact their friends who use Telegram. It is not a fork of Telegram and has nothing to do with the Telegram interface. (Note: OP wanted to use the Telegram client with a non-Telegram server. If you know of a Matrix client which looks and feels like the Telegram client, thats what theyre after.)

How is this relevant?

Likely yes. See the termux-notification-remove command from the termux-api package. (You will need the Termux:API plugin.)

Run a ssh server on the phone and rsync stuff over.

I have a built-in "PDF Viewer" app in my GrapheneOS. (app.grapheneos.pdfviewer)

Well, was it locked?

Yea, I know, I use it myself. My point is that it is no longer degoogled once you regoogle it.