[FIX] Subroute '/new_pnad_state changed to '/state', '/reg_code' to '/region' and '/age_range' to '/age_range_all'

[ADD] filters 'attendModality, attendsSchool, capitalCode, ethnicGroupNewPnad, metroCode and regionCode' added to convert files and id2str

Add functional version of middleware, add flag to check whether it runs default query or modified query