I don't see how villain can profitably bluff the river, since you are almost never on a missed draw here. He certainly should not value bet A7 either, since your weakest calling range is like TT-88/67s/78s. You don't have an underpair here ever I hope?

Folding turn seems standard, but I think calling turn and folding river is acceptable in this spot as well (he might bet the turn with A7 or fd but check the river).