When Mayor-elect Adrian Fenty announced last week that he’d chosen Cathy Lanier, a 16-year veteran of the Metropolitan Police Department, to replace Charles Ramsey atop the police force, local media didn’t do much more than throw together a few details on her history and her ideas for fighting crime in the District. The City Paper, though, started digging. The paper trail they uncovered on Lanier makes for relatively interesting reading by City Paper standards, though…