ExternalData for kitchen order items

In Api V8, the capabilities of specifying external information (ExternalData) for kitchen orders have been expanded. Now it can also be specified for order items.

The following operations have been added for this purpose:

• AddOrUpdateKitchenOrderItemExternalData - adding or updating ExternalData for an order item
• DeleteKitchenOrderItemExternalData - deleting ExternalData for the order item by the specified key
• TryGetKitchenOrderItemExternalDataByKey - get ExternalData at the order position by the specified key
• GetKitchenOrderItemAllExternalData - get all ExternalData at the order position

It is worth noting that for OLAP Sales Report for kitchen order items in ExternalData (field Public plugin data about preparation), ExternalData will also record the order. In case of key collisions, ExternalData items will take precedence.