refactor: Refactor file headers and add Psalm suppressions

- Added Psalm suppression annotations to multiple controller classes
- Added PHPDoc comment blocks to seeders and factories
- Added comments to indicate unused classes and methods
- Removed unused annotations and imports

app/Http/Controllers/Admin/NotesController.php

@@ -11,6 +11,9 @@ use Illuminate\Http\RedirectResponse;
 use Illuminate\Http\Request;
 use Illuminate\View\View;
 
+/**
+ * @psalm-suppress UnusedClass
+ */
 class NotesController extends Controller
 {
     /**