The Nuremberg trials have inspired filmmakers before, from Stanley Kramer’s 1961 drama to the 2000 television miniseries with Alec Baldwin and Brian Cox. But for the latest take, “Nuremberg,” writer-director James Vanderbilt focuses on a lesser-known figure: The U.S. Army psychiatrist Douglas Kelley, who after the war was assigned to supervise and evaluate captured Nazi leaders to ensure they were fit for trial (and also keep them alive). But his is a name that had been largely forgotten: He