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/Providers/RepositoryServiceProvider.php

@@ -0,0 +1,65 @@
+<?php
+
+namespace App\Providers;
+
+use App\Repositories\Contracts\ReadRepositoryInterface;
+use App\Repositories\Contracts\WriteRepositoryInterface;
+use App\Repositories\Domain\Read\DomainReadRepository;
+use App\Repositories\Domain\Write\DomainWriteRepository;
+use App\Repositories\Username\Read\UsernameReadRepository;
+use App\Repositories\Username\Write\UsernameWriteRepository;
+use Illuminate\Support\ServiceProvider;
+
+class RepositoryServiceProvider extends ServiceProvider
+{
+    public function register(): void
+    {
+        // Domain Repositories
+        $this->app->bind(
+            ReadRepositoryInterface::class.'\\Domain',
+            DomainReadRepository::class
+        );
+
+        $this->app->bind(
+            WriteRepositoryInterface::class.'\\Domain',
+            DomainWriteRepository::class
+        );
+
+        $this->app->singleton(DomainReadRepository::class, function ($app) {
+            return new DomainReadRepository($app->make(\App\Models\Domain::class), $app->make('cache'));
+        });
+
+        $this->app->singleton(DomainWriteRepository::class, function ($app) {
+            return new DomainWriteRepository($app->make(\App\Models\Domain::class), $app->make('cache'));
+        });
+
+        // Username Repositories
+        $this->app->bind(
+            ReadRepositoryInterface::class.'\\Username',
+            UsernameReadRepository::class
+        );
+
+        $this->app->bind(
+            WriteRepositoryInterface::class.'\\Username',
+            UsernameWriteRepository::class
+        );
+
+        $this->app->singleton(UsernameReadRepository::class, function ($app) {
+            return new UsernameReadRepository($app->make(\App\Models\Username::class), $app->make('cache'));
+        });
+
+        $this->app->singleton(UsernameWriteRepository::class, function ($app) {
+            return new UsernameWriteRepository($app->make(\App\Models\Username::class), $app->make('cache'));
+        });
+    }
+
+    public function provides(): array
+    {
+        return [
+            DomainReadRepository::class,
+            DomainWriteRepository::class,
+            UsernameReadRepository::class,
+            UsernameWriteRepository::class,
+        ];
+    }
+}