The quick-setup command for temperature monitoring was generating
--standalone --http-mode which is meant for Docker deployments. This
confused users trying to set up multi-server Proxmox monitoring.
Now uses --ctid which works for both local and remote Proxmox hosts.
The installer detects when the container doesn't exist locally and
installs in "host monitoring only" mode automatically.
If we can determine the actual CTID from the host proxy summary,
we use it; otherwise we show <PULSE_CTID> for the user to replace.
Related to #785
