The controller waits ~15 minutes with app mails after a crash boot of the host; it learns of the
crash boot from this route. Reads /var/lib/felhom-crash-guard/state.json (read-only, no Proxmox call)
and passes present/last_boot_at/last_boot_unclean/tripped through; a missing, unreadable or garbled
file answers 200 present:false. Guest-token authed like every sibling route.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_0159rPz1ZhFKsS53msqPYxtS
