- Replaced `orderWasCreatedDuringCompletion` flag with optimized checks for wash certificate attachment.
- Updated method signatures to use nullable `safety_seal` parameter for consistency.
- Enhanced `completeBooking` logic to prevent duplicate wash certificate creation or sending.
- Added `hasWashCertificateAttached` method to streamline order checks and improve clarity.
- Updated tests to cover edge cases for wash certificate attachment and email dispatch behavior.
- Introduced `safety_seal` column in the `orders` table.
- Updated order creation and completion logic to handle safety seal values.
- Enhanced order and booking classes to manage safety seal attachment and retrieval.
- Added tests to validate safety seal functionality in order processing.