A drone operator loads a Walmart package into Zipline's P1 fixed-wing drone for delivery to a customer home in Pea Ridge, Arkansas, on March 30, 2023.Bunee TomlinsonAutonomous delivery drone startup Zipline said Friday that it hit its 1 millionth delivery to customers and that it's eyeing restaurant partnerships in its next phase of growth.The San Francisco-based startup designs, builds and operates autonomous delivery drones, working with clients that range from more than 4,700 hospitals, inclu...