“Today, Polley is an auteur whose movies – Away From Her, Take This Waltz, and the autobiographical Stories We Tell – form a sort of three-part meditation on female restlessness, the complexity of long-term relationships, and the slipperiness of memory and truth. But back when she first tried to option the rights to Alias Grace at age 18 – as a well-regarded young actress with no filmmaking experience – Atwood turned her down. “