🐛 Make sure exceptions on WSGI get logged

That stopped working after moving to the async implementation

src/octoprint/server/util/tornado.py

@@ -824,6 +824,9 @@ def next_chunk():
             request.connection.finish()
             self._log(status_code, request)
 
+        except Exception:
+            logging.getLogger(__name__).exception("Exception in WSGI application")
+
         finally:
             if future is not None:
                 future.set_result(None)