GPU host prep

GPU spokes need host drivers, device plugins, and capacity labels before DCM placement can target them. Follow the umkim repo guide docs/components/gpu-host-prep.md for the current playbook tags and verification scripts.

Typical flow:

1. Prepare the host (drivers / toolkit) before or during cluster bootstrap.
2. Join the cluster via FleetClusterJoin (or lab Ansible).
3. Confirm node labels / allocatable GPUs.
4. Deploy inference catalog items and point FleetLLM backends as needed.