By Patricia Zengerle and Richard Cowan WASHINGTON (Reuters) -Conservative activist Virginia “Ginni” Thomas, wife of Supreme Court Justice Clarence Thomas, met for about four hours on Thursday with the congressional committee probing the Jan. 6, 2021, attack on the U.S. Capitol by supporters of then-President Donald Trump. Thomas was seen entering the meeting room used by the House of Representatives select committee for its interviews just before 9:30 a.m. EDT (1330 GMT). She departed at about 1:45 p.m. EDT, having left the room multiple times to huddle with her lawyer. The panel’s chairperson…