port build_host_files.py to Go, simplify Hermes MCP, cutover final

- cmd/hermes/main.go: removed redundant /mcp endpoint — Hermes gateway now
  serves only /query + /healthz. MCP goes direct to API (:8090/mcp).
- cmd/oikos/build_hosts.go: Go port of mcp/build_host_files.py as
  'oikos build-hosts'. Reads inventory.yaml, writes hosts/*.yaml.
- cmd/oikos/main.go: added build-hosts role.
- docker-compose.yml: hermes service simplified.
- apps/105: all 6 Oikos services stopped + disabled (confirmed inactive).
- Watchdog cron installed, API stop/restart verified.
- Infisical bootstrap pending (image pull timeout — retry separately).

Remaining:
- Port bin/homelab CLI to Go (separate plan — large surface)
- Caddy DNS push (needs dtoro/caddy-conf repo access)
- Rollback drill

hosts/arriman.yaml

@@ -1,38 +1,34 @@
-# 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
-name: arriman
-kind: lxc
-os: linux
-role: arr-stack
-state: active
+# Generated by oikos build-hosts from inventory.yaml.
+# Do NOT edit by hand.
+
 host: strong
-pve_id: 122
+kind: lxc
 lan_ip: 192.168.8.245
+mcp_endpoint: https://mcp.hubris.network/mcp
 mesh:
   tailscale:
     fqdn: arr
 mesh_globals:
-  primary: netbird
   accepted:
-  - netbird
-  - tailscale
+    - netbird
+    - tailscale
+  primary: netbird
 mounts:
-- /mnt/media_local
-public_hosts:
-- jellyseerr.hubris.network
-- qbit.hubris.network
-- sab.hubris.network
-runs:
-- arr_stack
-services_hosted:
-- name: arr_stack
-  backend: arriman
-  note: jellyseerr / qbit / sab on docker compose
-  doc_page: knowledge/wiki/containers/122-arriman.md
+  - /mnt/media_local
+name: arriman
 notes:
-- Migrated from hubris to strong 2026-07-05 (Phase 2). Library on ludo-lvm.
-- Contains homarr, radarr, sonarr, lidarr, sabnzbd, qbittorrent, bazarr, flaresolverr, prowlarr, jellyseerr
-- qBittorrent auth subnet whitelist expanded to 192.168.8.0/24 (for seanime + Caddy access)
-mcp_endpoint: https://mcp.hubris.network/mcp
+  - Migrated from hubris to strong 2026-07-05 (Phase 2). Library on ludo-lvm.
+  - Contains homarr, radarr, sonarr, lidarr, sabnzbd, qbittorrent, bazarr, flaresolverr, prowlarr, jellyseerr
+  - qBittorrent auth subnet whitelist expanded to 192.168.8.0/24 (for seanime + Caddy access)
+os: linux
+pve_id: 122
+role: arr-stack
+runs:
+  - arr_stack
 secrets_issuance_endpoint: https://secrets.hubris.network/issue
+services_hosted:
+  - backend: arriman
+    doc_page: knowledge/wiki/containers/122-arriman.md
+    name: arr_stack
+    note: jellyseerr / qbit / sab on docker compose
+state: active