(Photo: Birgit Gufler) One of the more interesting events at Innsbruck’s Early Music Festival is its Oper Jung production, cast with singers who took part in the previous year’s Cesti Competition and who, therefore, are generally in the early stages of their careers. This summer’s presentation was Händel’s 1734 opera “Arianna in Creta,” which relates Theseus’s quest to kill the {…}