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

containers/118-elementsynapse.md

@@ -1,6 +1,6 @@
 # 118 — `elementsynapse`
 
-Matrix homeserver (Synapse). Backs `@dtoro:avispero` and `@claudio:avispero`.
+Matrix homeserver (Synapse). Backs `@dtoro:avispero`.
 
 ## At a glance
 - **Hostname:** `elementsynapse`
@@ -33,10 +33,10 @@ All five bridges run as plain `docker compose` stacks under `/root/mautrix-<name
 - `/var/lib/matrix-synapse/media_store` is the dominant grower (~2 GiB at last check). If disk pressure returns, purge remote media via the Synapse admin API before resizing further.
 
 ## Known issues
-- ~~Disk usage was 86.8% at last claudio-monitor reading on 2026-04-21~~ — resolved by growing rootfs to 16 GiB on 2026-05-15.
+- ~~Disk usage was 86.8% at last legacy monitor reading on 2026-04-21~~ — resolved by growing rootfs to 16 GiB on 2026-05-15.
 
 ## Related
-- [claudio-bot (123)](123-claudio-bot.md) — connects directly to `192.168.8.239:8008` (avoids hairpin-NAT TLS issue on the public URL)
+- ~~[claudio-bot (123)](123-claudio-bot.md)~~ — decommissioned 2026-06-04, replaced by Hermes Agent
 - [Caddy](121-caddy.md)
 - [DNS](../infrastructure/dns.md)
 - [Monitoring](../infrastructure/monitoring.md)