Fixes backup system authentication and hostname resolution issues. Changes: - Change PermitRootLogin from "no" to "prohibit-password" in global SSH config (allows key-based root login for host-to-host backups while blocking passwords) - Update fuchsia onsite backup to use viridian.home.arpa FQDN instead of shortname - Update SSH knownHosts to use FQDNs (fuchsia.home.arpa, viridian.home.arpa) (system-level config uses FQDNs, user shortcuts remain in home-manager) This enables the complete 3-2-1 backup strategy with automated backups working correctly between fuchsia and viridian, and fuchsia to BorgBase.  | 
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| .. | ||
| secrets/rekeyed | ||
| age.nix | ||
| default.nix | ||
| env.nix | ||
| nix.nix | ||
| ssh.nix | ||