Individual state nullification of unconstitutional federal acts does not exclude an Article V Convention. The two can be done in parallel. An Article V Convention needs time and a lot of things done the right way. It is a longer-term solution than immediate state nullification, but a valid option and should be pursued, howbeit the best of the COC proposals being that by the Citizens for Self-Governance.
In the meantime, any state that longs to be the land of the free and the home of the brave can validly nullify and reject unconstitutional federal acts and protect its citizens, like this clerk, from such tyranny NOW.
What does the KY Governor and Legislature say on this matter? Anything?
I'm sure the Governor could send State Troopers to the jail to free her.