refactor: add modules folder to phpstan paths + fix errors

modules/PremiumPodcasts/Models/SubscriptionModel.php

@@ -28,7 +28,7 @@ class SubscriptionModel extends Model
     protected $primaryKey = 'id';
 
     /**
-     * @var string[]
+     * @var list<string>
      */
     protected $allowedFields = [
         'id',
@@ -55,17 +55,17 @@ class SubscriptionModel extends Model
     protected $useTimestamps = true;
 
     /**
-     * @var string[]
+     * @var list<string>
      */
     protected $afterInsert = ['clearCache'];
 
     /**
-     * @var string[]
+     * @var list<string>
      */
     protected $afterUpdate = ['clearCache'];
 
     /**
-     * @var string[]
+     * @var list<string>
      */
     protected $beforeDelete = ['clearCache'];
 
@@ -131,8 +131,13 @@ class SubscriptionModel extends Model
      */
     protected function clearCache(array $data): array
     {
+        /** @var ?Subscription */
         $subscription = (new self())->find(is_array($data['id']) ? $data['id'][0] : $data['id']);
 
+        if (! $subscription instanceof Subscription) {
+            return $data;
+        }
+
         cache()
             ->delete("subscription#{$subscription->id}");
         cache()