feat: implement repository architecture with smart caching

- Add base repository interfaces and abstract classes
  - Implement separated read/write repositories for Domain and Username models
  - Add intelligent query caching with automatic invalidation
  - Include cache management service and CLI commands
  - Add comprehensive configuration for cache TTL and monitoring
  - Enhance performance through optimized data access patterns

app/Repositories/Contracts/RepositoryInterface.php

@@ -0,0 +1,16 @@
+<?php
+
+namespace App\Repositories\Contracts;
+
+interface RepositoryInterface extends ReadRepositoryInterface, WriteRepositoryInterface
+{
+    public function getModel(): string;
+
+    public function startTransaction(): void;
+
+    public function commitTransaction(): void;
+
+    public function rollbackTransaction(): void;
+
+    public function transaction(callable $callback): mixed;
+}