Update: This story has been updated to include a statement from Judge Brennan on his May 10 confirmation.After operating with up to four empty seats at a time for more than eight years, the federal appeals court in Chicago will soon be up to full strength.The U.S. Senate on Monday unanimously confirmed U.S. District Judge Amy St. Eve and Michael Y. Scudder of Skadden, Arps, Slate, Meagher & Flom LLP to the 7th U.S …