SOCHI, Russia—Russia’s Kamila Valieva won the Rostelecom Cup on Saturday by beating her own free skate and combined total score world records a day after smashing the world record in the short program. The 15-year-old reinforced her status as a gold-medal favorite for next year’s Beijing Olympics by leading a Russian podium sweep. Silver medallist Elizaveta Tuktamysheva trailed Valieva by more than 40 points, while Maya Khromykh took the bronze. All three qualified for the Grand Prix Final in Japan next month. Skating to Ravel’s Bolero, Valieva effortlessly completed three quadruple jumps to earn 185.29 points for a combined total of 272.71, two world records. On Friday she set a new high score of 87.42 in the short program. On the men’s side, Georgia’s Morisi Kvitelashvili edged Mikhail Kolyada of Russia to win his first Grand Prix title, but the Russian’s second-place finish was enough to qualify him for next …