A plaintiff cannot sue his former business partner for violating a confidentiality agreement because the agreement’s sole purpose was to conceal the existence of a potential federal banking crime, a state appeals panel ruled Friday.The 1st District Appellate Court found that the agreement between plaintiff Richard Signapori and defendant Jignesh Jagaria was designed to prevent either party from divulging the fact they did not disclose required information to two banks when financing their hotel purchases.Both …