docs: highlight only the Hiến pháp and Luật/Bộ luật document-type cells

docs: bold hierarchy table header and the Constitution (Level 1) row

docs: bold the hierarchy coverage sentence

data: add the 2013 Constitution (Hiến pháp) to the 2026 split

docs: add last updated date to dataset card

docs: drop redundant Issue reference bullet from dataset card

docs: restructure dataset card to follow Hugging Face datasets-cards standard

docs: add Vietnamese Legal Hierarchy section to README

research: add HF last-updated field for both datasets to th1nhng0 comparison

data: add 2 missing in-force laws (Luật Căn cước 26/2023, 149/2025)

research: count active Luật/Bộ luật over all docs (fix parseable-only undercount)

research: add active Luật/Bộ luật breakdown to th1nhng0 comparison

research: compare UTS_VLC with th1nhng0/vietnamese-legal-documents

data: add reference SQLite database (database/vn_law.sqlite)

refactor(data): use Số hiệu as entry id in corrected 2026 split

fix(data): corrected 2026 split as verified in-force snapshot (issue #1035)

fix(scraper): validate fetched content matches requested law (issue #1035)

Update contact email

Reorder splits to show 2026 first

Set default split to 2026

Update dataset card with comprehensive documentation

Add all splits: 2021, 2023, 2026

Add split 2023 (208 documents)

Add dataset card and scripts

Add split 2026

Add split 2021

initial commit