SAN FRANCISCO — The man who allegedly broke into U.S. House Speaker Nancy Pelosi’s home and beat her 82-year-old husband in October pleaded not guilty Wednesday to six charges, including attempted murder, prosecutors said.The suspect, David DePape, had planned to kidnap the speaker — who was in Washington at the time of the attack — when he broke into the couple’s San Francisco home on Oct. 28, authorities said. Instead, the 42-year-old defendant severely beat her husband Paul Pelosi with a …