[Hotfix] Method `get_country_buildings_iter` does not copy the floorspace attribute
The function get_country_buildings_iter does not copy the floorspace attribute, leading to a different finalizer output for the SpatiaLite and PostGIS processes.
The function get_country_buildings_iter does not copy the floorspace attribute, leading to a different finalizer output for the SpatiaLite and PostGIS processes.