docs features hardware packages parts scripts secrets shared ssh-key-manager-registry ssh-settings-registry ssh_settings systems testing users .gitignore .sops.yaml CHANGELOG.md HETZNER-BOOTSTRAP-STATUS.md Impermanence.md README.md RISCV_CLUSTER_PLAN.md bootstrap-fresh-nixos.sh build.log fast_initial_build.md flake.lock flake.nix remove-adingbatponder.sh