5-minute health monitoring for all 4 machines + Gitea: - SSH connectivity check (socket-based, instant) - Service check via SSH (nginx, gitea, hermes-agent, evennia) - Disk usage check on all machines - Local process check (hermes, ollama, openclaw, evennia) - Telegram alert with 1-hour cooldown per alert - Running uptime stats saved to ~/.local/timmy/fleet-health/uptime.json - Per-day log files Fixes timmy-home#555, FLEET-006