refactor(jobs): unify middleware configuration to prevent job release after expiration for DockerCleanupJob and PushServerUpdateJob

app/Jobs/DockerCleanupJob.php

@@ -31,7 +31,7 @@ class DockerCleanupJob implements ShouldBeEncrypted, ShouldQueue
 
     public function middleware(): array
     {
-        return [(new WithoutOverlapping($this->server->uuid))->expireAfter(600)];
+        return [(new WithoutOverlapping($this->server->uuid))->dontRelease()];
     }
 
     public function __construct(public Server $server, public bool $manualCleanup = false) {}