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.
- scripts/refresh-kubeconfig.sh fetches a fresh kubeconfig from CP1
- Ansible site.yml Finalize step now uses public IP instead of Tailscale
hostname for the kubeconfig server address
- Updated AGENTS.md with kubeconfig refresh instructions
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