NEW YORK -- “The Mole Agent” infiltrated a nursing home in Chile, and countless of hearts around the world including inside the film academy.The moving documentary about an octogenarian hired as a rookie spy to investigate whether a client’s mother is suffering abuse in the facility is competing for an Oscar this Sunday, but director Maite Alberdi constantly doubted whether she would have enough for a movie.“I think the main challenge was that we were walking on eggshells,” said Alberdi, who on