Adds vars/per-machine/<target>/openssh/ for every flake target except
lxc-tor-relay and lxc-nix-cache (already committed). 18 targets recovered
from pve1 host-keys/ backup; lxc-gui and proxmox-minimal have no prior
live deployment and no backup key, so fresh ed25519 keys were generated —
their .sops.yaml anchors were updated to match.
All secrets are admin-only encrypted (matching clan_generate_ssh_key
convention). Age fingerprints verified against .sops.yaml anchors.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01B2EJ4qTsM5KUqhS5c3GAwx
