Portland Opera is set to present “The Juliet Letters” as part of its 60th anniversary season. The opera, which opens on Nov. 15, 2024, and runs through the 24th for a total of six performances at Artists Repertory Theater, will feature Portland Opera Resident Artists including  Matthew Maisano, Ginaia Black, Erin Roth Thomas, and Nathaniel Catasca. They are joined by {…}