MIAMI — In hindsight, the clues were always there. Genie Milgrom grew up attending Miami Catholic schools, but something always felt off. She was spiritual, but felt called to something else. Her mother’s side of the family never went to church. Her grandmother’s Spanish culinary traditions turned out to be kosher practices. And when Milgrom converted to Judaism as an adult, her grandmother and mother kept warning her, “It’s so dangerous.” Milgrom’s documentary film, “Between the Stone and the Flower,” follows her decades-long journey of uncovering her family’s hidden Jewish heritage dating to…