Fatal error: Uncaught Error: Class "Illuminate\Database\Migrations\Migration" not found in /home/fortebku/smtp-mail/database/migrations/2026_04_18_000001_add_throttle_columns_to_campaigns.php:16 Stack trace: #0 {main} thrown in /home/fortebku/smtp-mail/database/migrations/2026_04_18_000001_add_throttle_columns_to_campaigns.php on line 16