refactor(dotfiles): remove registry replication

src/dotfiles/registry.nix

@@ -22,9 +22,17 @@ let
       };
     in
     {
-      inherit (evaluated.config) type replicate checks;
+      inherit (evaluated.config) type checks;
     };
 
+  data = validate (
+    lib.mapAttrs (
+      registryName: _registry:
+      lib.mapAttrs (hostName: host: host.config.registry.${registryName}.${hostName} or { }) hosts
+    ) definitions
+  );
+
+  validate = import ./registry/validation.nix { inherit definitions lib; };
 in
 {
   types = lib.mapAttrs (_name: definition: definition.type) definitions;
@@ -43,8 +51,13 @@ in
     ) definitions;
   };
 
-  collected = import ./registry/collection.nix {
-    inherit definitions hosts lib;
-    validate = import ./registry/validation.nix { inherit definitions lib; };
+  collected = data // {
+    join =
+      host: entry:
+      lib.filterAttrs (_name: value: value != null) (
+        lib.mapAttrs (
+          registryName: _registry: (data.${registryName}.${host} or { }).${entry} or null
+        ) definitions
+      );
   };
 }