Sopranos dead by the final curtain are a dime a dozen; murderous sopranos are rarer; sopranos who slay murderous roles scarcer still. As “Tosca,” in the Canadian Opera Company’s revival of Puccini’s beloved work which opened on April 30th, Canadian soprano Adrianne Pieczonka died, murdered, and slayed, not necessarily in that order. A Triumphant Diva Her death should have been {…}