Completing on okfn/ideas#41 (we are nearly there - need some input from @stefanw )
looking at https://github.com/okfn/ckanext-issues - basically this is about per-dataset issue tracking (think of something like github issues for a given dataset). This is already functional and being worked on and may provide quite a bit of what you need (at least if publishers actually owned the relevant datasets)
We have very basic functionality to email someone if we have an email if data is not open or the status is unknown. There is potential for more:
Some discussion of using Frag den Staat for exactly this purpose: https://github.com/okfn/ideas/issues/41
...to replace an older OKF project.
*I did something like this a while back: https://github.com/mattfullerton/publicHealthInsuranceCompaniesGermany/blob/master/scripts/simplePDFtableScraper.py#L70
@stefanw @rgrp - one day when we all have infinite amounts of time we can write a CKAN plugin based on froide