Cade Cunningham is not treating a 2-0 lead like comfort. If anything, he sounds like a player who knows exactly how quickly a playoff series can shift. After the Pistons protected home court and took control early against Cleveland, Cunningham pointed back to Detroit’s first-round battle with Orlando as the reminder this team needed. “Going through that series, realized how long a playoff series can be,” Cunningham said. “ It’s a war more so than just a battle.” That perspective matters now because Detroit is heading to Cleveland for Game 3 with a chance to put real pressure on the Cavaliers. Cunningham said the Pistons understand the line between winning and losing remains thin, even after two straight wins. “Being up 2-0 right now, we know it’s a thin line still,” Cunningham said. “It’s one game at a time. We got to go into Cleveland now and they’re going to have their home fans around them.…