Feature Request: Add new subfield topicClassTermURI to citation metadata

[doigl]

Overview of the Feature Request
Analogue to the addition of a termURI field to the keywords in the citation metadata blocks, the same idea should also be applied to the topicClassification fields:

• add a new subfield topicClassTermURI (with topicClassification as the parent) to the citation metadata block
• migrate contents from topicClassVocabURI or topicClassValue to topicClassTermURI (if that field was used for a term URI before)
• change DataCite export format, so that the content of topicClassTermURI goes into the property valueURI of the subject element: topicClassValue

See corresponding commit for keyword.

What kind of user is the feature intended for?
(Example users roles: API User, Curator, Depositor, Guest, Superuser, Sysadmin)
All depositors

What inspired the request?
#10288

What existing behavior do you want changed?

Add valueURI to Topic Classification information exported to DataCite.

Any open or closed issues related to this feature request?
#10288

Are you thinking about creating a pull request for this feature?

yes, is already in progress

[DS-INRAE]

We were planning to have the same addition in our installation's tsv (like keywords) even if we didn't proceed :)

[DS-INRAE]

@doigl are you still working on a PR for this issue ? :)