On Mattermost, Mathieu Saby suggested adding an option to the OAI-PMH harvester for providing a bibliographic framework. At the moment, it adds all new records using the Default framework, but it would be useful to specify a different framework. -- It looks like the way to do it would be to add a column to the oai_servers table, update the web form, and then update Koha/OAI/Client/Harvester.pm to pass the framework to AddBiblio(). I suppose another option would be to add a CLI parameter. That would be faster/easier, but... it would be incongruent with how most of the config works, so probably the oai_servers table.
I don't plan to write patches for this one at this time, but happy to test/QA it.