Daniel D'Addario Chief TV CriticSay this much about “Keep Breathing”: It’s admirably immune to streaming-era bloat.Could its story, of a woman confronting the pain of her past while trying to stay alive after a plane crash, have been told in a ninety-minute film? Well, sure. But in six episodes that hew pretty close to the half-hour mark, the series makes its points, underlines them a couple of times, and then moves on.Here, Melissa Barrera plays Liv, who is clinging to life (get it?).