Kali Flanagan started out as a figure skater at the age of 4 but got her first taste of defeat two years later, when she placed third to her younger sister’s first-place win at a figure-skating competition in Acton.That upset could have been the end of her fledgling career on ice. But one day not long afterward, her father, Bill Flanagan, a hockey coach and former Division 1 player, came home and found her in the basement, knee-deep in his hockey gear, swallowed by his old jersey.