Foxconn, the electronics manufacturing company that assembles Apple's iPhones, apologized Thursday for the pay dispute that triggered massive employee protests, and violent police pushback, at a factory in central China where anti-virus controls slowed production. Mounting unrest at the Zhengzhou factory has persisted for at least a month, since thousands of employees staged a walkout in October over what they said were unsafe working conditions linked to the spread of COVID-19. All of this comes as China grapples with a spike in virus infections, seen especially in highly populated cities. Foxconn hired a slate of new employees following the exodus….