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/Console/Commands/WarmUpRepositoryCache.php

@@ -0,0 +1,61 @@
+<?php
+
+namespace App\Console\Commands;
+
+use App\Services\CacheService;
+use Illuminate\Console\Command;
+
+class WarmUpRepositoryCache extends Command
+{
+    protected $signature = 'repo:cache:warm
+                            {--force : Force warm-up without confirmation}';
+
+    protected $description = 'Warm up repository cache with frequently accessed data';
+
+    public function __construct(
+        protected CacheService $cacheService
+    ) {
+        parent::__construct();
+    }
+
+    public function handle(): int
+    {
+        if (! config('repositories.cache.warming.enabled', false)) {
+            $this->error('Cache warming is disabled in configuration.');
+
+            return Command::FAILURE;
+        }
+
+        if (! $this->option('force') && ! $this->confirm('Warm up repository cache?')) {
+            $this->info('Cache warm-up cancelled.');
+
+            return Command::SUCCESS;
+        }
+
+        $this->info('Warming up repository cache...');
+        $this->cacheService->warmUpCache();
+        $this->info('Repository cache warmed up successfully.');
+
+        $stats = $this->cacheService->getCacheStats();
+        $this->table(['Metric', 'Value'], [
+            ['Memory Usage', $this->formatBytes($stats['memory_usage'])],
+            ['Peak Memory', $this->formatBytes($stats['peak_memory'])],
+            ['Cache Tags', implode(', ', $stats['tags'])],
+        ]);
+
+        return Command::SUCCESS;
+    }
+
+    protected function formatBytes(int $bytes): string
+    {
+        $units = ['B', 'KB', 'MB', 'GB'];
+        $unitIndex = 0;
+
+        while ($bytes >= 1024 && $unitIndex < count($units) - 1) {
+            $bytes /= 1024;
+            $unitIndex++;
+        }
+
+        return round($bytes, 2).' '.$units[$unitIndex];
+    }
+}