1step,rule,n_before,n_after,n_removed,rationale21,row has exactly 5 CSV fields,1200,1164,36,lines with wrong field count are corrupted export garbage; content cannot be read unambiguously32,"all fields match declared formats (S+5 digits id, municipality text, valid ISO date, integer price incl. quoted comma-thousands form, positive numeric area)",1164,1164,0,fields that do not match their format cannot be read unambiguously43,sale_id unique,1164,1164,0,duplicate ids would be ambiguous5