Mike Isabella decamped from D.C. to Florida a year ago, but the fallout from a 2018 sexual harassment scandal and the business failures that followed continues to shadow the one-time celebrity chef years after his prolific D.C. restaurant group crumbled. Three former employees at Requin, the contemporary French restaurant on the Southwest Waterfront that was one of the last two businesses in Isabella’s collection to go under, are accusing the chef, two partners, and a manager, of wage theft and