feat: add app and database modules

app/Observers/PermissionObserver.php

@@ -0,0 +1,50 @@
+<?php
+
+namespace App\Observers;
+
+use App\Models\Permission;
+use Illuminate\Support\Facades\Auth;
+
+class PermissionObserver
+{
+    /**
+     * Ketika permission sedang dibuat
+     */
+    public function creating(\App\Models\Permission $permission)
+    {
+        if (Auth::check()) {
+            $permission->created_by = Auth::id();
+        }
+    }
+
+    /**
+     * Ketika permission sedang diupdate
+     */
+    public function updating(\App\Models\Permission $permission)
+    {
+        if (Auth::check()) {
+            $permission->updated_by = Auth::id();
+        }
+    }
+
+    /**
+     * Ketika permission selesai diupdate
+     */
+    public function updated(\App\Models\Permission $permission)
+    {
+        \Illuminate\Support\Facades\Cache::forget("permission_status:{$permission->name}");
+    }
+
+    /**
+     * Ketika permission didelete (termasuk soft delete)
+     */
+    public function deleted(\App\Models\Permission $permission)
+    {
+        \Illuminate\Support\Facades\Cache::forget("permission_status:{$permission->name}");
+        
+        if (Auth::check()) {
+            $permission->updated_by = Auth::id();
+            $permission->saveQuietly();
+        }
+    }
+}