On a cold-for-northern California day, two days before Christmas, people streamed into the California Theater to attend the final performance of – “Cinderella” on Market Street in San Jose (a.k.a. Silicon Valley). Not “Cenerentola,” Rossini’s comic piece, but a work by a 12-year old composer, unveiling the debut for her second opera. Yes, on a similar heroine – a poor, {…}