Late in the Hulu murder mystery “Death and Other Details,” a lawyer who acts as a fixer for a wealthy family describes his career. “At first it’s fantastic — a bunch of people spinning around like the world just came unglued and they’re all looking at you like you’re the only person that can stick it back together again.” But then, he says, you blink and you’re 60. “And they all have families and big, messy, beautiful lives. And you’re the guy with a file full of someone else’s secrets no one wants to sit with at a party.” Richly written, with both humor and attention to, well, death and other…