feat: implement system-wide activity logging with database persistence, repository patterns, and admin controller access.

app/Repositories/ActivityLog/ActivityLogRepositoryInterface.php

@@ -0,0 +1,11 @@
+<?php
+
+namespace App\Repositories\ActivityLog;
+
+use App\Repositories\BaseRepositoryInterface;
+use Illuminate\Contracts\Pagination\LengthAwarePaginator;
+
+interface ActivityLogRepositoryInterface extends BaseRepositoryInterface
+{
+    public function filter(array $filters, int $perPage = 20): LengthAwarePaginator;
+}