“ The Real Housewives of Salt Lake City ” is ascendant in its sixth season, with each episode topping the last — the show has become must-watch live viewing. The Bravo show is on a years-long roll rarely seen on television. And arguably, that roll crystalized (to mix metaphors) in the show’s Season 4 finale, in which star Heather Gay unmasked fellow cast member Monica Garcia as an internet troll who’d harassed the women for years, providing the “Receipts! Proof! Timeline! Screenshots” that both