Finance editor Jeff John Roberts here. The explosive growth of the robotics industry in recent years is reflected in new technology feats, but also by the proliferation of new business and distribution models. Ultra, a startup that leases its devices to warehouses under a monthly “robots as a service” model, is a case in point. On Friday, the Brooklyn-based company announced it had raised $62 million, while also deepening a partnership with the buzzy “robot brains” AI firm Physical Intelligence....