DoorDash, Inc. (NASDAQ:DASH) and Serve Robotics Inc. (NASDAQ:SERV) unveiled a multi-year agreement on Thursday to broaden autonomous sidewalk deliveries across the United States, beginning with participating merchants in Los Angeles.The companies said the partnership will integrate Serve’s robots into DoorDash’s multi-modal logistics network, alongside human Dashers and drones, to speed deliveries and cut emissions as order volumes rise.The rollout builds on Serve’s operations in Los Angeles, Miami, Dallas, ...