A female police officer who alleges Chicago police refused to investigate after she was physically assaulted by an off-duty officer cast the net too wide in her bid for evidence, a federal judge held.In a written opinion last week, U.S. Magistrate Judge Young B. Kim granted a request for a protective order made by the city of Chicago and the police officers named as defendants in Venus Rodriguez’s civil rights lawsuit.The protective order bars Rodriguez — at least for now — from engaging in discovery …