_get_vm_disk_and_boot() now returns a list of disk dicts (name, size_mb)
instead of a single total. Each disk entry is read from the VM config
via /qemu/{vmid}/config or /lxc/{vmid}/config. The onboot flag is also
read from the same config endpoint.
Both QEMU VMs and LXC containers are covered. The 'disks' and 'onboot'
keys are added to every entry in the vms_snapshot.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>