Improve performance of loading bound-with titles

[maccabeelevine]

Replace low-level API calls with the single call the FOLIO UI uses to get an item's boundWithTitles.

The item record passed into the getBoundWithRecords function is a brief record. Calling GET /inventory/items/$id returns the full item record including a boundWithParts structure with all the instance-level data we need. This involves more calls internally on the backend but is much faster from the client perspective, reducing an O(n) operation to constant time.

[demiankatz]

Thanks, @maccabeelevine -- a couple of questions. Additionally, might it be worth adding test coverage for this functionality? If you haven't done that before, I can provide some tips on capturing fixtures for FOLIO driver tests.

[maccabeelevine]

Additionally, might it be worth adding test coverage for this functionality?

Yup TBD

[demiankatz]

Thanks, @maccabeelevine!