Reduce request / response body size for batch approvals: Part II

Restructure how products are associated in the batch approvals requests and responses. Currently, the information about each orderable is present in every line item. It also means that it is repeated as many times as many requisitions have been selected for batch approve. To avoid that, we could restructure the DTO, so the line items do not contain the full orderableDto (which would be repeated x times for x requisitions) but just the orderableId. A list of full orderableDto would be attached separately (either as a completely separate call or probably just as a part of the same response).

Before starting the implementation, please reach to the group with the proposed design of this refactor (perhaps a class diagram)