HARRISBURG, Pa. — Pennsylvania’s attorney general commented publicly for the first time earlier this week about the criminal charges that could end her career, but spent more time blaming her legal troubles on a “grand plan” to conceal pornographic and racially insensitive e-mails circulated among judges and state prosecutors.Kathleen Kane on Wednesday challenged a judge to make public the “filthy e-mail chain” that led to last year’s porn e-mail scandal, promising to call a second …