Fix all variable.undefined errors across controllers, jobs, services, and tests

app/Http/Controllers/DiscoverController.php

@@ -215,6 +215,7 @@ class DiscoverController extends Controller
         abort_if(! $this->config()['memories']['enabled'], 404);
         $type = $request->input('type') ?? 'posts';
 
+        $res = [];
         switch ($type) {
             case 'posts':
                 $res = Status::whereProfileId($pid)

app/Http/Controllers/GroupController.php

@@ -321,6 +321,7 @@ class GroupController extends GroupFederationController
         $type = $request->input('type');
         $item = $request->input('item');
 
+        $res = null;
         switch ($type) {
             case 'instance':
                 $res = Instance::whereDomain($item)->first();

app/Services/FilesystemService.php

@@ -40,6 +40,7 @@ class FilesystemService
         $filesystem = new Filesystem($adapter);
 
         $writable = false;
+        $res = [];
         try {
             $filesystem->write(self::VERIFY_FILE_NAME, 'ok', []);
             $writable = true;

database/factories/UserFactory.php

@@ -13,6 +13,7 @@ use Faker\Generator as Faker;
 |
 */
 
+/** @var \Illuminate\Database\Eloquent\Factory $factory */
 $factory->define(App\User::class, function (Faker $faker) {
     return [
         'name' => $faker->name,

tests/Pest.php

@@ -1,5 +1,5 @@
 <?php
 
 expect()->extend('toBeOne', function () {
-    return $this->toBe(1);
+    return $this->toBe(1); // @phpstan-ignore-line
 });