Streamline AI docs, add skills, enforce symlink-everything policy

- Add .claude/skills/: homelab-context (auto-loads key facts each session),
  homelab-status (/homelab-status command), deploy-config (symlink setup guide)
- Remove AGENTS.md and ai/sessions/: superseded by plan mode + skill system
- Remove 4 obsolete session commands (session-start/list/switch, reload-instructions)
- Rewrite CLAUDE.md: remove duplicate content, enforce symlink policy, clarify sudo pattern
- Trim docs/services.md from 946 to ~230 lines: remove planning-era content,
  keep install steps and current status for migration reference
- Strip stale "sudo cp" deploy header from ssh-honeypot.service (now symlinked to repo)
- Update TODO.md: mark NAS migration and symlink tasks done, add jellyfin upgrade warning

config/systemd/ssh-honeypot.service

@@ -1,12 +1,3 @@
-# SSH Honeypot Service
-# Deploy to: /etc/systemd/system/ssh-honeypot.service
-# 
-# Setup commands:
-#   sudo cp config/systemd/ssh-honeypot.service /etc/systemd/system/
-#   sudo systemctl daemon-reload
-#   sudo systemctl enable ssh-honeypot.service
-#   sudo systemctl start ssh-honeypot.service
-
 [Unit]
 Description=SSH Honeypot (Port 22)
 After=network.target