Another day, another diarrhea outbreak. A pricey Southern California resort where rooms rent for hundreds of dollars a night is the latest player in the poopy mess that has been the American summer of 2026, according to a local health department. Public health officials in San Diego County are warning anyone who swam in the pools at the Gaylord Pacific Resort and Convention Center in Chula Vista between Jul. 24 and Aug. 15 they may have been exposed to a highly-contagious parasite — known for landing unwitting water lovers in a stinky situation that can last weeks. The agency is currently…