Aggregate metadata for ui-requests

In order to simplify the presentation of a request together with the referenced item, requestor (patron/user) and loan (via the item) provide the facility to include these records in a single request.

API Design

Introduce a new endpoint to provide optional inclusion (thoughts welcome on what this should be named):

GET /circulation/requests/{id}/combined

UI Context

The current requirements for UIREQ issues call for the following fields (some of these properties do not exist yet):

From the item (identified by itemId):

• barcode *
• title *
• author (out of scope)
• call number (out of scope)
• volume (out of scope)
• copy (out of scope)
• enumeration (out of scope)
• shelving location (out of scope)

From the user (identified by requesterId):

• name *
• barcode *
• patron group

The Requests front-end module (ui-requests), in addition to using its own /requests endpoint from mod-circ-storage, also needs access to related metadata from Users and Items. It would be more efficient to aggregate this data in a back-end business logic module than to try to combine it all in ui-requests.