A Chicago attorney’s decade-long legal battle on behalf of a defense contractor leaves the Iraqi government facing a multimillion-dollar verdict in an American court.Robert J. Pavich of Pavich Law Group P.C. said interest on the $89 million judgment for Wye Oak Technology Inc. brings the total sum owed to between $135 million and $150 million.Pavich represents Wye Oak, a Pennsylvania-based contractor that entered into an agreement with Iraq’s Ministry of Defense in August 2004 to refurbish tanks and other …