- Add 5-minute expiration for cached department webhooks in `redis.php`.
- Cast department ID to integer in `departments_o.php`.
- Refactor Slack notification logic to use `send_webhook_message` for custom department webhooks.
- Update `send_webhook_message` visibility from protected to public in `slack.php`.
Implemented functionality to split collected order invoices, ensuring proper validation and handling processor constraints. Added a notification system to inform departments about new bookings via Slack or SMS. Also, included minor enhancements such as a corrected Gateway API URL and improved form handling for wash certificate emails.
Updated the message format to simplify content, translate to Danish, and remove unnecessary fields. This improves clarity and aligns with localized conventions.