Remove note column; lang→col 3

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Update column name: region→country

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Upload test/test_invariants.py with huggingface_hub

Merge duplicate tests: consolidate primary+alt pairs into single tests

Add 6 new invariant tests: Latin-only en, no empty lists, hierarchy parent/children

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Add 19 new invariant tests; fix BE-WAL, TJ-RA, JP-01, AD-07, MK-205, BY-HM, JO-JA, UA-30

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[test] add zh/ru script-purity invariants incl alts

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[iso_3166-2] fix stale parent code formats

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[iso_3166-2] remove hash invariant tests

[iso_3166-2] remove hash field, rank code and name first

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Update test to load from HF Hub

Document invariants and add test instructions

Add invariant tests

Add comprehensive documentation with hash field explanation

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Force schema index refresh

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Update README with schema documentation

Clean up

Trigger index refresh

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initial commit