If reading this litany has been exhausting, it’s testament to just how well “Game of Thrones” has done at leavening this grimness with humor, tenderness and moments of real human connection. But it also ought to suggest how odd it is to accuse the showrunners of adding a sexual assault to somehow up the stakes when, dragons aside, intimate violence is already at the core of so many of the series’ storylines. There’s no requirement that anyone like any of these storylines or that anyone who feels exhausted from spending his or her days in a world marked by sexual violence retreat to a worse one for pleasure. But that’s not the same thing as proof that “Game of Thrones” is generally careless in its depiction of sexual assault or that rape doesn’t serve a purpose on the show. Sansa Stark isn’t ruined, as a character or as a person, because she was raped. She lives, and her story continues, even if you’re not tuning in to watch