Grappling with a res judicata question that generated “much confusion in the federal courts,” the Illinois Appellate Court considered “whether a bankruptcy adversary judgment is a final decision in a ‘court of competent jurisdiction’ when state law claims are involved.”“For purposes of res judicata,” Justice Aurelia Pucinski’s majority opinion concluded in Anthony P. DiMucci’s appeal from a summary judgment that ordered him to pay $734,089 to National Union Fire …