* Add "discount" support to order line items
* Fix total_price annotation for ExtraLineItem
* Add regression tests
* Add frontend support
* Updated documentation
* Added docs
* Bump API version and CHANGELOG
* Remove 'total_price' annotation
- Can be achieved using in-memory python methods
* Apply fix for migration testing
* Revert "Apply fix for migration testing"
This reverts commit 8d9f2dce8c.
* Different approach
* Adjust playwright threshold