refactor: shared config metadata

modules/hosts/polaris/default.nix

@@ -30,7 +30,7 @@ in
     };
 
     users = {
-      kiri = metaLib.mkHostUser {
+      kiri = {
         account = metaLib.users.kiri;
         needsPassword = true;
         homeImports = [
@@ -41,7 +41,7 @@ in
         ];
       };
 
-      ergon = metaLib.mkHostUser {
+      ergon = {
         account = metaLib.users.ergon;
         needsPassword = true;
         homeImports = [