By Angelo Muredda Not a Lana Del Rey cover, dommage, but a riff on his usual concerns of voyeurism, Gallic family strife, and the ambiguity of pretty girls, François Ozon’s Young & Beautiful is an accomplished trifle. We’re in Ozon country from the first shot, a young peeping Tom’s through-the-binoculars gaze at his sunbathing teenaged…