6251c8edef
Pulls the services.openthread-border-router NixOS module directly from nixpkgs-unstable since it isn't in 25.11 yet. Service stays disabled in this commit; configuration follows. Also promotes `self` from `_module.args` to `specialArgs` in machines/configuration.nix, since `imports` are evaluated before `config` and so can't reach `_module.args.self`. Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>