THE FIRST THING I NOTICED about 1962’s Cléo from 5 to 7, one of the more enduring hits from filmmaker and artist Agnès Varda, is that the run time is not two hours but ninety minutes. Where did those thirty minutes go? How did she make a “real-time” film that doesn’t execute its promise? I always neglect to keep tabs on that missing half hour; I’m enjoying the film too much. Such is Varda’s slippery genius. She creates a structure, then leaves just enough room to show you how she did it—if you know how to see it. Varda knew all