Darius Tahir SAN FRANCISCO — Health and fitness care’s business enterprise course returned to its San Francisco sanctuary final week for JPMorgan’s once-a-year overall health care confab, at the gilded Westin St. Francis lodge on Union Sq.. Soon after a two-12 months pandemic pause, the temper among the the executives, bankers, and startup founders in attendance had the aura of a reunion — as they gossiped about promotions, perform-from-house routines, who’s having what investments. Dressed in their capitalist best — ranging from fantastic-blue or pastel-purple blazers to puffy-coat chic — they thronged to large parties, housed in art galleries or restaurants. But the get together was tinged with new stress…