JEFFERSON CITY, Mo. — State capitols are often referred to as “the people’s house,” but legislatures frequently put up no-trespassing signs by exempting themselves from public-records laws. That tendency was apparent when the Associated Press sought emails and daily schedules of legislative leaders in all 50 states. The request was met with more denials than approvals. Some lawmakers claimed “legislative immunity” from the public-records laws that apply to most state and local officials.