“I want to fly with the music; we have to swim inside the music,” said Michele Mariotti in 2017, when Lisette Oropesa appeared in a rehearsal video for the Royal Opera House’s “Lucia di Lammermoor.” Fast forward to 2026, and she still sings the “Mad Scene” with unequivocal ease; her voice soars to vertiginous heights before collapsing into the {…}