BOSTON — A bill that would regulate ride-hailing services like Uber and Lyft, including requiring drivers undergo criminal background checks and mandate they carry insurance policies of at least $1 million, was unveiled Thursday by Massachusetts Senate leaders.Unlike a House version of the bill, the Senate version would not ban drivers working for ride-hailing companies from picking up passengers at Boston's Logan International Airport, a provision meant to appease the taxi industry, which has struggled against the competition.