Leo Cullen was asked about Joey Carbery at Leinster’s pre-season game last Saturday, and he reached back eight years to answer it: “He should never have gone in the first place, but that’s what happens when you get strong-armed by somebody else at the top.” That’s a head coach still annoyed about a provincial transfer from 2018. It tells you how long this one has been rumbling and how Irish rugby has yet to find a sensible solution. Next week all four provinces will name their first teams for the URC. In each squad there will be players discovering they…