A service check used to bake its hosting LXC's lan_ip and SSH it directly as
root, which failed because the scheduler key is authorized on the Proxmox hosts
but not inside every guest — leaving all 8 service process checks 'down' even
after the guest routing and scripts were fixed.
ResolveExecTargetForCheck now, for a non-guest target, walks the
provides/runs-on/hosts edges to the compute entity that runs it and routes
through that: pct/qm exec if the host is a guest, direct SSH with the host's
correct user (workstation `user` attr) if it's a machine. The guest-resolution
path is shared via resolveGuest, and the scheduler no longer needs an
isMachine special case — one resolver handles guest, machine, and service.
dtoro
a104cb4bb4