Flanked by his top legal and housing officials in a mid-March press conference, New York City Mayor Zohran Mamdani touted the city’s lawsuit against the landlord of 919 Prospect Avenue, a rent-stabilized building in the Bronx with a history of housing code violations, including leaks, mold, and heat outages.“Let the scale of this penalty show how seriously we take the threat of building mismanagement that puts residents’ and neighbors’ health at…