For a while, the blueprint for a serious wellness trip looked pretty much the same everywhere. A flight to somewhere warm, a resort with a view of jungle or terraced rice paddies, a treatment menu borrowing names from ancient traditions, and enough linen to last a lifetime. Scotland was never really part of that picture. It was the place people went for whisky, castles and rain, not the place they went to reset. Then this summer, Scotland’s men’s football team appeared at their first World Cup...