Correcting zip_4 field name and marking business fields optional
Correcting zip_4 field name and marking business fields optional

fedspendingtransparency/data-act-broker-backend,chambers-brian/SIG_Digital-Strategy_SI_ODP_Backend,chambers-brian/SIG_Digital-Strategy_SI_ODP_Backend,fedspendingtransparency/data-act-broker-backend