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>

scripts/sync/macos/network.hubris.homelab-context-sync.plist

@@ -0,0 +1,32 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+    <key>Label</key>
+    <string>network.hubris.homelab-context-sync</string>
+
+    <key>ProgramArguments</key>
+    <array>
+        <string>/usr/bin/git</string>
+        <string>-C</string>
+        <string>/opt/homelab-context</string>
+        <string>pull</string>
+        <string>--ff-only</string>
+        <string>--quiet</string>
+    </array>
+
+    <key>StartInterval</key>
+    <integer>300</integer>
+
+    <key>RunAtLoad</key>
+    <true/>
+
+    <key>StandardOutPath</key>
+    <string>/var/log/homelab-context-sync.log</string>
+    <key>StandardErrorPath</key>
+    <string>/var/log/homelab-context-sync.log</string>
+
+    <key>Nice</key>
+    <integer>10</integer>
+</dict>
+</plist>