Fix flake.lock bump host-check regressions (redo-2 MCP type + romeo-2 Jellyfin hash)

[Copilot]

The scheduled flake.lock bump updated inputs to revisions that broke check-hosts on two hosts. This PR keeps the lock bump and applies two narrow compatibility fixes so host evaluation can proceed again.

• Home Manager MCP command typing (redo-2)

  • programs.mcp.servers.aws-support-mcp-server.command was set to a derivation, but current Home Manager expects null | string.
  • Updated the value to a string path interpolation.

• nixarr Jellyfin OpenAPI hash patch (romeo-2)

  • The temporary nixos/romeo/nixarr.nix patch only covered Jellyfin OpenAPI hashes through 10.11.10.
  • Added the missing 10.11.11 hash entry to match the bumped dependency set.

# home-manager/bcnelson/_mixins/mcp/aws/support.nix
programs.mcp.servers.aws-support-mcp-server = {
  command = "${awsSupportLauncher}";
};

# nixos/romeo/nixarr.nix (patch payload)
"10.11.10" = "sha256-3FfqhqQfuQdM/02NyhAWDW7H6OaTynWtaUBoSIxk4AQ=";
"10.11.11" = "sha256-4p/DaeyuVGdsrrUMu8AGtcTulZkGwA8eAvb4PbnCJ/s=";