Proxmox VE hypervisors and Proxmox Backup Server aren't FreeIPA clients,
so they sit outside the dev_mon_base host-group flow. Add standalone
CheckMK local checks (cluster/storage/guests/backup for PVE; datastore
usage/last-backup/task-failures for PBS) plus a small installer that
detects the role, installs the agent, and registers the host under
/ansipa/infra — mirroring the existing dev_mon.sh pattern without
requiring IPA enrollment.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>