At the stroke of midnight, California is lifting most of its COVID-19 restrictions and ushering in what has been billed as the state’s “Grand Reopening.” Starting Tuesday, there will be no more state rules on social distancing, and no more limits on capacity at restaurants, bars, supermarkets, gyms, stadiums or anywhere else. And masks — one of the most symbolic and fraught symbols of the pandemic — will no longer be mandated for vaccinated people in most settings, though businesses and counties can still require them.