The cluster nodes can reach the exported NFS path on 10.27.27.239, not
10.27.27.22. Update the storage addon and repo note so the NFS provisioner
mounts the live export and Flux health checks can converge.
Replace Hetzner infrastructure and cloud-provider assumptions with Proxmox
VM clones, kube-vip API HA, and NFS-backed storage. Update bootstrap,
Flux addons, CI workflows, and docs to target the new private Proxmox
baseline while preserving the existing Tailscale, Doppler, Flux, Rancher,
and B2 backup flows.