“Handcrafted” has become such a buzzword in the wine industry that it’s almost meaningless, superfluous. But not at BoaVentura de Caires, the Livermore Valley winery owned by Brett Caires. His operation is truly handcrafted. Brett planted the vineyards and renovated the horse corral that’s now his winery and tasting room almost wood plank by wood plank. He salvaged redwood, a couple of stained glass windows and a door from buildings on the nearby Concannon Vineyard property that were being demolished. And, oh yeah, Brett farms the vineyards and makes the wine. His hands are on every grape cluster, every vat of fermenting grape juice, every barrel of aging wine, every bottle filled and dipped in wax. BoaVentura is not your typical winery, and that’s what makes it such a wonderful place to visit. When you pull up the steep driveway, you see a sign that says “No limos past this…