2025-04-14: Cart Service - support external discounts

Overview

The cart service now allows to specify external discounts on an item level. The functionality requires the cart.cart_manage_external_prices scope to add an external discount to the item.

Added endpoints

Endpoint	Description
Adding a product to cart	Added the externalDiscounts attribute.
Adding multiple products to cart	Added the externalDiscounts attribute.
Updating a cart item	Added the externalDiscounts attribute.

Known problems

There are no known problems.