Added:

- Messenger, Mercure
- chapter download flow (lelscan only)

src/Service/NotificationService.php

@@ -0,0 +1,20 @@
+<?php
+
+namespace App\Service;
+
+use Symfony\Component\Mercure\HubInterface;
+use Symfony\Component\Mercure\Update;
+
+class NotificationService
+{
+    public function __construct(private HubInterface $hub)
+    {
+
+    }
+
+    public function sendUpdate(string $topic, mixed $data): void
+    {
+        $update = new Update($topic, json_encode($data));
+        $this->hub->publish($update);
+    }
+}