For California’s local governments hoping to have some say over where and how large apartment buildings get packed near major transit stops, it’s crunch time. Last fall, state lawmakers made it legal for developers to build mid-rises — some as tall as nine stories — in major metro neighborhoods near train, subway and certain dedicated bus stops. But the final version of Senate Bill 79 , which goes into effect on July 1, offered local governments plenty of wiggle room over the where, when and