A celebrated 18th-century actress who died too young under mysterious circumstances, Adriana Lecouvreur was the talk of Paris in life and in death. So much so, in fact, that her friend Voltaire paid for her autopsy, just to stop all the rumors that she had been poisoned by her nemesis, the Duchesse de Bouillon. Clearly, someone had to write an opera. It took almost two centuries, but Italian composer Francesco Cilea debuted his four-act in 1902. (The Metropolitan Opera last staged it in 1963.) There’s a love triangle – two, actually – and a meaty role in Adriana, played here by celebrated soprano Anna Netrebko. This is an encore performance of a show that was broadcast live on Saturday.