Fix duplicate EmailLog rows for a single sent email

Mailer dispatches MessageEvent twice when routed through Messenger:
once when queuing (queued=true) and once on the actual send from the
worker (queued=false). EmailLoggerListener logged on both, creating
two rows per email actually sent. Skip the queued dispatch.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

src/Tech/EventListener/EmailLoggerListener.php

@@ -22,6 +22,10 @@ class EmailLoggerListener
 
     public function onMessage(MessageEvent $event): void
     {
+        if ($event->isQueued()) {
+            return;
+        }
+
         $message = $event->getMessage();
         if (!$message instanceof TemplatedEmail) {
             return;