SANTA CLARA, Calif. — In a season that had been about the Detroit Lions exorcising their demons, it was the San Francisco 49ers who got revenge, 66 years in the making Sunday night at Levi’s Stadium. The 49ers overcame the identical 17-point halftime deficit they surrendered to the Lions in the 1957 Western Conference Championship, surging past the visiting team and into a Super Bowl matchup with the Kansas City Chiefs, 34-31. With the defeat, the Lions have fallen short of playing in a Super Bowl for the 58th consecutive year of the event’s existence, doing so in one of the most heartbreaking…