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

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

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

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