feat: infer/validate monetary_fields object_name from structure, slim report

fix: rework monetary_fields as in-place feature-extract config with status report

feat: add pure amount parser, monetary-field detection and batch price-parser API

feat: add local on-device extraction (/json/feature-extract)

optimization 404

common middlewre for /api/v1

feat: did optimization and cleanup

feat: add qr extractor