refactor(jobs): update WithoutOverlapping middleware to use expireAfter for better queue management

app/Jobs/PushServerUpdateJob.php

@@ -71,7 +71,7 @@ class PushServerUpdateJob implements ShouldBeEncrypted, ShouldQueue
 
     public function middleware(): array
     {
-        return [(new WithoutOverlapping($this->server->uuid))->dontRelease()];
+        return [(new WithoutOverlapping($this->server->uuid))->expireAfter(30)];
     }
 
     public function backoff(): int