Add functionality to set 856 second indicator for purl added to MARC

[arcadiafalcone]

Context

Use cases have surfaced for the user being able to define the second indicator of the purl 856, to capture different relationships between the SDR digital object and the physical or digital resource described by the MARC record.

Currently the 856 is generated with second indicator "1" by default. This value indicates that the digital object is a version of the object described, e.g. a digitized version of a physical book. However, other kinds of relationships are present in the SDR. These include:

• The resources are the same - the record describes the digital object in the SDR (ind2 = 0)
• The record describes a different but related resource, such as a collection inventory spreadsheet deposited to the SDR, or documentary images of physical media where the content has not been digitized (ind2 = 2)
• The record describes a larger resource of which the digital object is a part, such as when part of a book is digitized for a patron request (ind2 = 3) or when only part of a born-digital object may be deposited into the SDR due to the presence of PII (ind2 = 4)

Making this change will make the SearchWorks online access facet and link display more accurate by distinguishing between cases where all or part of the resource is digitized, versus when only a related item is digitized.

Actions

1. Prerequisite in cocina-models: Add a property to record the digital object-ILS record relationship to cocina-models as part of Catalog Record ID. (The original thought was to add this feature to the release workflow, but it's a relationship that is stable across release actions so it makes more sense to include it in the metadata.)

2. Update the Argo catkey/FOLIO ID editing modal to allow the user to select the 856 second indicator as follows: In the modal launched by clicking the pencil icon next to the ILS ID, a column should be added between the ILS ID and the trash icon with the label "856 2nd indicator" (OK to split into two lines if necessary). Underneath the label should be a drop-down menu with the numbers 0-4 as options. Either as a tooltip next to the label or within the modal itself, the following help text should be presented to the user:

The 856 second indicator describes the relationship of the SDR object to the catalog record:
0 - The catalog record describes the same digital object
1 - The catalog record describes the physical item that has been digitized
2 - The catalog record describes another resource related to the SDR object
3 - The catalog record describes the digital object of which the SDR object is a part
4 - The catalog record describes the physical item of which the SDR object is a digitized part

3. Change the process that generates the purl 856 to pull second indicator info from the cocina data.

Note

Depending on usage, future work to add the second indicator (and refresh status) to the update catalog ID bulk action may be indicated.