License terms for vn_documents_ocr_v2 — mixed PD + CC0

Per-record license is in metadata.jsonl ("license" field). Two regimes
apply:

1. The 9 records in the `real` config are public-domain Vietnamese
   government works under Luật Sở hữu trí tuệ Việt Nam, Điều 15
   (Vietnamese law does not extend copyright to legal-normative
   documents, administrative texts, or judicial documents). Sources:
     - chinhphu.vn (Văn phòng Chính phủ — Office of the Government)
     - hanoi.gov.vn (Ủy ban nhân dân TP Hà Nội — Hanoi People's Committee)
   Each record's "source_url" field links to the upstream PD original.

2. The 3 records in the `synthetic_scan` config plus this README and
   the `_generate.py` script are released under Creative Commons
   Zero v1.0 Universal (CC0). To the extent possible under law, the
   contributors have waived all copyright and related or neighboring
   rights. Full text:
     https://creativecommons.org/publicdomain/zero/1.0/legalcode

Personal data: none. The PD government records name public officials
(Prime Minister, Ministers, Vice Chairs of People's Committees) in
their official capacities — public record under Vietnamese law. The
synthetic receipts use fictional names, addresses, ID numbers, phone
numbers, and amounts.

Redistribution: combine both regimes by treating the dataset as
CC0 + public-domain. No attribution is legally required, but a
citation to nrl-ai/vn-ocr-documents-eval is appreciated.