By Michael Rosenberg The 15-year-old skater at the center of an ongoing doping dispute leads the competition, but as a result, the entire event—and the IOC’s system—is in pieces. View the original article to see embedded media. BEIJING — Representing a country that technically isn’t here, after a performance she shouldn’t have been allowed to give, on her way to a medal she can’t receive, 15-year-old star Kamila Valieva walked past reporters at Capital Indoor Stadium, avoiding questions she couldn’t answer. She had skated beautifully, but that isn’t the point. Welcome to the most elegant sham …