15c42e1f24
- add `require_disk_space` function to lib/common.sh with dedup logic for shared filesystems - gate cloudpanel, coolify, pterodactyl installs behind a 2–3 GB disk check - gate uptime-kuma, proxmox update, harden, update-server, and server-benchmark behind 300–1024 MB disk checks - fail early with a clear error before apt installs or config writes can leave the system in a partial state