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polish-dynaword

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Withdraws common_voice_pl (whole source) from main. It was never released: release: None, and it is not in the v0.2.5 tag.

Hub PRs 56 (openstax_pl) and 57 (fandom_pl) are merged; this branch is rebased onto main (1d66074), so the diff shows only the common_voice commit. Hub PR 59 (wikiquote) is stacked on this one.

Reason. CC0 is Common Voice's platform-level label, and nothing shows the sentences themselves are CC0. The shard was matched against Common Voice's Polish sentence files using NFKC + casefold + removal of all non-word characters (openstax_cv.md B.3):

• Europarl. The European Parliament legal notice allows reuse with source acknowledgement. When only part of an item is reproduced, it also asks for the URL of the complete item. The shard carries neither, and an attribution condition can't sit under CC0. Mozilla's 2020 Europarl legal review was never shown as completed.
• Sentence Collector. Volunteers attest these sentences are public domain, but their sources aren't recorded. sentence_domain is "unspecified" for 45,035 of 45,043 rows.

The audit's alternative, dropping only the Europarl sentences, was not chosen. References: artifacts/rights_audit_2026-10/reports/citations.md L35 and reports/citations/openstax_cv.md section B, Corrections 6-13.

What this PR removes

• data/common_voice_pl/: 45,043 documents / 994,922 tokens, plus the attribution sidecar, licence evidence, card and NOTICE.
• The src/sources.py entry. No legal-note stub is kept, because nothing was released.
• src/fetch_common_voice_pl.py and src/test_common_voice_pl_contract.py, plus the artifacts only they read: artifacts/common_voice_pl_ontology_manifest.json and artifacts/common_voice_pl_language_audit.json. Git history keeps them.

README and CHANGELOG changes

• README:
  • The table row and the single-sentence note are removed.
  • The v0.2.6-dev total is now 1,285,412 documents / 1,256.8M tokens.
  • The main header now reads 34 sources / 4,047,790 documents.
  • The contributor entry now says 13 further sources, and the PR #22 link is dropped.
• CHANGELOG:
  • The line is moved to "Removed from main".
  • The sentence-level paragraph is dropped.
• artifacts/source_findings.md: an entry is appended.

Checks

• python3 -m pytest from the repo root: 259 passed on a clean tree (on main 1d66074; fandom_pl's tests left with Hub PR 57).
• render_sample.py: not applicable, since this is a removal with no shard to sample.
• python3 src/verify_paper_claims.py --tex ../polish-dynaword-v2/main.tex fails with LookupError: no table with \label{tab:s04-wersje} in the .tex. This is a known tooling gap (polish-dynaword-v2 #61). common_voice_pl is not in the paper.

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