fix(jobs): change RevokeUserGrants properties from private to protected

Private typed properties in the abstract parent class are not restored
during queue job unserialization, causing "must not be accessed before
initialization" errors when the concrete child class is deserialized
by the queue worker.

Author: smarcet

app/Jobs/RevokeUserGrants.php

@@ -37,22 +37,22 @@ abstract class RevokeUserGrants implements ShouldQueue
     /**
      * @var int
      */
-    private int $user_id;
+    protected int $user_id;
 
     /**
      * @var string|null
      */
-    private ?string $client_id;
+    protected ?string $client_id;
 
     /**
      * @var string
      */
-    private string $reason;
+    protected string $reason;
 
     /**
      * @var string
      */
-    private string $client_ip;
+    protected string $client_ip;
 
     /**
      * @param User $user