UPDATE: Rescheduling planned after technical issues forced cancellation. Umberto Giordano’s exhilarating drama returns to the Met repertory for the first time in 25 years. Packed with memorable melodies, showstopping arias, and explosive confrontations, Fedora requires a cast of thrilling voices to take flight, and the Met’s new production promises to deliver. Soprano Sonya Yoncheva, one of today’s most riveting artists, sings the title role of the 19th-century Russian princess who falls in love with her fiancé’s murderer,