EXCLUSIVE: In a surprising move, Ryan Ly has exited Creative Artists Agency after 12 years, most recently as the head of the agency’s TV lit department. After a brief stint at UTA right after college, Ly started at CAA in 2005. He was a rising star at the agency where his clients have included Better Call Saul showrunner Peter Gould, Castle Rock co-creator creator Sam Shaw, and Good Girls Revolt Dana Calvo. Details about the circumstances surrounding Ly’s sudden departure…