Webhook küldés újrapróbálással, kétszeri küldés nélkül

class SendVideoWebhookJob implements ShouldQueue
{
    use Queueable;

    public $tries = 5;
    public $backoff = [10, 30, 60, 300];   // seconds to wait between attempts
    public $timeout = 30;

    public function handle(): void
    {
        // Several jobs can reach the "finished" state independently:
        // only the first may send, so claim the flag under a row lock.
        $shouldSend = DB::transaction(function () use ($video) {
            $locked = Video::whereKey($video->id)->lockForUpdate()->first();

            if (! $locked || $locked->webhook_sent_at !== null) {
                return false;
            }

            $locked->update(['webhook_sent_at' => now()]);

            return true;
        });

        if (! $shouldSend) {
            return;
        }

        try {
            $response = Http::timeout(10)->post($callbackUrl, $payload);

            if ($response->failed()) {
                throw new \RuntimeException("Webhook endpoint responded with HTTP {$response->status()}");
            }
        } catch (\Throwable $e) {
            // Release the flag, otherwise the retry would think it was already sent.
            $video->update(['webhook_sent_at' => null]);

            throw $e;
        }
    }
}