As a teenager, Tony Gianunzio dreamed of pitching at Wrigley Field, propelling the Chicago Cubs to a World Series title and breaking a long championship drought … at the time, more than 30 whole years. World affairs had other ideas: A few months after drawing some attention during a Cubs tryout camp in 1942, Gianunzio would be in the Coast Guard, eventually headed into service in the Pacific as a gunner’s mate aboard the patrol frigate Machias. “The summer of ’42 had promised me the best of days,” Gianunzio would write in his memoir. “Youth had seemed a forever gift, and now all…