Phase 1: cross-client homelab context + MCP scaffolding

Add the foundation for distributing homelab context to every client
(LXCs, VMs, workstations including republic-laptop, mac-mini, ludo-mini)
with a single source of truth, structured query layer (MCP), and per-client
age-key issuance for secrets:

- inventory.yaml — canonical topology (hosts, services, mesh addresses)
- hosts/*.yaml — per-host identity files generated from inventory by
  mcp/build_host_files.py; do not edit by hand
- AGENTS.md — orientation doc symlinked to /root/AGENTS.md on every client
- bootstrap.sh — one-shot enroll (Linux + macOS), clones repo, fetches age
  key from issuance, installs sync timer/launchd job, drops the homelab CLI
- bin/homelab — single-binary Python CLI: whoami, list, ssh, pct, logs,
  restart, open, status, secret, sync, mcp, client add/remove, nuke
- mcp/server.py — FastMCP server: context tools + read-only management
  tools (no mutations exposed); shell-outs use mcp-reader restricted ssh key
- mcp/deploy/ — claudio-monitor-style gitea webhook deploy scaffold for the
  MCP service on LXC 105 (ports 9810 mcp, 9811 webhook)
- secrets-issuance/ — per-client age key auto-provisioning over the mesh;
  source-IP gated against inventory, with denylist for revoked clients
  (ports 9820 issue, 9821 webhook)
- secrets/, .sops.yaml — SOPS recipient scaffolding; the operator fills in
  age public keys after Phase 3a generates them
- scripts/sync/ — systemd timer (Linux) + launchd plist (macOS) pulling
  /opt/homelab-context every 5 min

Mesh: both Netbird (preferred, 100.122.0.0/16) and Tailscale accepted
during the in-flight migration; no client is gated on completing the move.

Plan reference: /root/.claude/plans/lets-make-a-plan-fluttering-trinket.md

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

hosts/nextcloud.yaml

@@ -0,0 +1,31 @@
+# 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: nextcloud
+kind: lxc
+os: linux
+role: file-sync
+host: hubris
+pve_id: 114
+lan_ip: 192.168.8.224
+mesh:
+  netbird:
+    fqdn: nextcloud.netbird.selfhosted
+mesh_globals:
+  primary: netbird
+  accepted:
+  - netbird
+  - tailscale
+mounts:
+- /mnt/library
+public_host: cloud.hubris.network
+runs:
+- nextcloud
+services_hosted:
+- name: nextcloud
+  url: https://cloud.hubris.network
+  backend: nextcloud
+see_also:
+- containers/114-nextcloud.md
+mcp_endpoint: http://apps.netbird.selfhosted:9810/sse
+secrets_issuance_endpoint: http://apps.netbird.selfhosted:9820/issue