Refactor SSH key management to use centralized key retrieval function for nixremote users across configurations.

modules/users/nixremote.nix

@@ -1,13 +1,13 @@
-{ lib, config, ... }:
+{ lib, config, inputs, ... }:
 {
   options.my.users.nixremote = {
     enable = lib.mkEnableOption "nixremote user for distributed builds";
     authorizedKeys = lib.mkOption {
       type = lib.types.listOf lib.types.path;
-      default = [
-        ../../secrets/ssh/ed25519_nixworkstation.pub
-        ../../secrets/ssh/ed25519_nixserver.pub
-        ../../secrets/ssh/ed25519_nixminiserver.pub
+      default = inputs.self.lib.getSshKeys [
+        "nixworkstation"
+        "nixserver" 
+        "nixminiserver"
       ];
       description = "List of SSH public key files to authorize for nixremote user";
     };