claudio-bot: decommission LXC 123, archive repos, migrate monitoring to Hermes

- Destroy LXC 123 (claudio-bot) — freed 8 GiB rootfs, 512 MiB RAM, 1 core
- Archive dtoro/claudio-bot and dtoro/claudio-monitor on Gitea (read-only)
- Stop claudio-monitor.timer on hubris, remove /opt/claudio-monitor
- Extend homelab-hardware-health skill with LXC resources, service health, apt/docker drift
- Create homelab-health-watchdog cron (15 min, Matrix alerts, actionable options)
- Wire Matrix (matrix:dtoro) as health alert delivery platform
- Update 13 files: inventory, containers/*, infrastructure/*, hosts/*, README, .sops.yaml
- Add deprecation plan at plans/2026-06-04_130000-deprecate-claudio-bot.md

hosts/claudio-bot.yaml

@@ -1,3 +1,4 @@
+# DEPRECATED — LXC 123 destroyed 2026-06-04. Replaced by Hermes Agent.
 # Generated by mcp/build_host_files.py from inventory.yaml.
 # Do NOT edit by hand — your changes will be overwritten.
 # Source of truth: ../inventory.yaml