Since 2006, Napa Valley’s Festival del Sole has lured the likes of Joshua Bell and the Russian National Orchestra to wine country in the summer months for an orgy of the tasteful high life: the world’s finest musicians paired with the region’s best wines, enjoyed between meals at the area’s architecturally exquisite estates, vineyard strolls, and test drives of the Bentleys parked on display. On Friday, thanks to the sponsorship of Dede Wilsey, the festival added ballet to its pleasures, with tremendous success. “Stars of American and Russian Ballet” sold out Yountville’s Lincoln Theater.