A proposal to crack down on hospitals if they leave homeless and unstable patients at various sites failed to advance to the City Council Thursday. City Councilman Kevin McCarty proposed an ordinance that would have required health care facilities to get written permission from patients before transporting them to sites other than their homes. If the proposal was passed into law by the City Council, health care facilities that did not comply with the ordinance would face a misdemeanor charge. But the city’s law and legislation committee, which studies proposed ordinances, decided not to move the proposal to the City Council. Councilmembers Sandy Sheedy, Steve Cohn, Lauren Hammond and Ro