Balanchine’s Coppélia is the kind of ballet that will convert the unbelievers. It charmed Pacific Northwest Ballet’s artistic director Peter Boal at the ripe old age of 9, prompting him to declare “That’s what I want to do” before he was old enough to cross the street on his own. Then Boal made it his mission to bring the classic comedy to Seattle, to re-imagine the story of two...