The movie “Paterson” is a throwback to the pre-9/11 days when magical realism was all the rage on storefront stages and art house screens.Jim Jarmusch, one of the high priests of this indie form, in which fantastical elements are accepted as natural in otherwise mundane settings, is the director.Back then, in a world where nothing could go wrong — or so we thought — irony resonated. Later, as times turned, irony became an adolescent’s luxury and the absurd became indistinguishable from our …