nixpkgs: 50ab793 -> 531670d (nixos-26.05, was nixos-24.11 EOL)
sops-nix: 77c423a -> f140661 (master, buildGo125Module now builds on 26.05)
3-release channel jump (24.11 -> 25.05 -> 25.11 -> 26.05) to match the
orchestrator host and get CVE patches. 24.11 was EOL (2025-06-30).
Notable 26.05 changes reviewed: systemd Stage 1 boot (default, no config
change needed), dbus-broker default, bash nixos-rebuild removed (Python
rewrite mandatory; git present on host), MySQL 8.0 removed (not used as a
NixOS module). No system.rebuild/fileSystems/boot.initrd options in the
host config, so no config edits required.
Host decrypts /run/secrets/test_secret via its ssh host key (age identity);
off-box master recovery recipient. sops-nix pinned to a buildGoModule-era rev
for nixpkgs 24.11 compat.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Pins nixpkgs to the rev cc-ci already ran (no-op-then-base); deploy via
switch --flake on-host. System healthy (gen 3) post-switch.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
