In a living room audition for “A Chorus Line,” the young dancer, Sydney Skybetter, brings enviable energy to his task. It’s not surprising that the twig grew to a tree, choreographing this lovely solo to Schubert lieder for dancer Bergen Wheeler. [Music:  Schubert’s Schwanengesang, D.957 (Cycle): Ständchen “Leise Flehen Meine Lieder, Fritz Wunderlich tenor.] In ...