A federal appeals panel on Wednesday affirmed the Chicago police union waited too long to intervene in consent decree negotiations between the city government and the Illinois Attorney General’s Office.The 7th U.S. Circuit Court of Appeals agreed with U.S. District Judge Robert M. Dow Jr. that the Fraternal Order of Police, Lodge No. 7 should have filed its motion to intervene shortly after Attorney General Lisa M. Madigan sued the city in August 2017.The FOP, the panel found, was aware from the start that the …