Fix transfer recipient emails not sending in production.

Map MAIL_ENCRYPTION to a valid SMTP scheme, send recipient notifications
synchronously, document mail/queue env vars, and add a supervisor worker template.

Co-authored-by: Cursor <cursoragent@cursor.com>

app/Notifications/TransferRecipientNotification.php

@@ -4,11 +4,10 @@ namespace App\Notifications;
 
 use App\Models\Transfer;
 use Illuminate\Bus\Queueable;
-use Illuminate\Contracts\Queue\ShouldQueue;
 use Illuminate\Notifications\Messages\MailMessage;
 use Illuminate\Notifications\Notification;
 
-class TransferRecipientNotification extends Notification implements ShouldQueue
+class TransferRecipientNotification extends Notification
 {
     use Queueable;