LP1889694 Staff catalog record summary API

LP1889694 Staff catalog record summary API

Replaces a number of result page and record detail page API calls with a
bespoke API specifically created to return the data required for display
bib and metabib record summary information in the catalog.

Specifically, a single streaming API this replaces the following:

* fleshed record retrieval
** including record display fields and attributes processing.
* copy count retrieval
* hold count retrieval

The end result is 22 API calls per results page replaced with 2.

Signed-off-by: Bill Erickson <berickxx@gmail.com>