PHOENIX, Ariz. — The San Diego Padres played a delayed opening-day game on a pleasant evening inside the massive airplane hangar known as Chase Field, and Yu Darvish got them started by chasing history. In the end, they couldn’t even win. The Diamondbacks walked them off in the ninth inning, winning 4-2 on Seth Beer’s home run against Craig Stammen, spoiling Bob Melvin’s first game as Padres manager. Robert Suarez, making his major league debut, began the ninth inning with the Padres up 2-0. He walked two batters and hit a third without getting an out. Stammen’s first pitch bounced to the back…