Jennifer Maas TV Business WriterSUN VALLEY, Idaho — The Elon Musk watch is on.The first full day of Allen & Co.’s exclusive conference and retreat for the wealthy and well-connected concluded Wednesday at the luxe Sun Valley resort. Even among the assembled 1%-ers, there was anticipation for the arrival of the maverick leader of Tesla and SpaceX, who is expected to make an appearance at the annual meeting of moguls and C-suite titans.Following Tuesday’s many arrivals and some solo morning time, during which Verizon chief Hans Vestberg went for a run around the resort in the 6 a.m.