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

inventory.yaml

@@ -272,16 +272,7 @@ hosts:
     mounts:
     - /mnt/library
     age_pubkey: ''
-  claudio-bot:
-    kind: lxc
-    pve_id: 123
-    host: hubris
-    os: linux
-    role: matrix-agent
-    lan_ip: 192.168.8.230
-    notes:
-    - Reads /opt/homelab-context/ on startup
-    age_pubkey: age1xmkeq968areza2necqyq0065dpeegngzyr6dhagh0n6pl33lccfqe5mqn9
+  # 123 (claudio-bot) — destroyed 2026-06-04, replaced by Hermes Agent
   authentik:
     kind: lxc
     pve_id: 124