- Add infra/boot.sh: lightweight startup (no build) that brings up the
Podman stack — used by the systemd unit on every system boot
- start.sh now installs/refreshes hiy.service (a systemd --user unit)
and enables loginctl linger so it runs without an active login session
After the next `infra/start.sh` run the Pi will automatically restart
the stack after a reboot or power cut.
https://claude.ai/code/session_01FKCW3FDjNFj6jve4niMFXH
