SAN DIEGO — Leonard Glenn Francis, the mastermind behind the worst bribery and corruption scandal in U.S. Navy history, appeared Thursday in San Diego federal court for the first time since he left house arrest and fled the country in 2022, just weeks before he was set to be sentenced. Known as “Fat Leonard” because of his size, Francis was not charged Thursday with any new crimes related to his escape. Federal prosecutors said they may seek new charges at some point, but not until after he’s sentenced in the bribery and fraud scheme. Meanwhile his longtime defense attorneys re-upped a previou…