Refresh flake.lock with newer revisions for several packages, turn off
the
Affinity suite in the desktop configuration, and add a new SSH host
entry
for gitssh.garandplg.com with its own identity and port settings.
- Simplify server aliases and add tailscale‑specific aliases
- Make SSH module accept a username argument
- Add match block for Tailscale host with port 22 and identity file