tools: post-pull auto-setup hook + caveman (RTK-style token optimization)

scripts/sync/linux/homelab-context-sync.service

@@ -1,15 +1,14 @@
 [Unit]
-Description=Pull /opt/homelab-context from Gitea
+Description=Pull /opt/homelab-context from Gitea + auto-setup tooling
 After=network-online.target
 Wants=network-online.target
 
 [Service]
 Type=oneshot
-ExecStart=/usr/bin/git -C /opt/homelab-context pull --ff-only --quiet
+ExecStart=/usr/bin/env bash /opt/homelab-context/tools/post-pull.sh
 TimeoutStartSec=60
-# Don't fail aggressively — a missed pull just retries next tick.
 SuccessExitStatus=0 1
 Nice=10
 
 [Install]
-WantedBy=multi-user.target
+WantedBy=multi-user.target