wiktionary_examples: add record links, reword the quotation note (v2#110)
Adds the per-record links to wiktionary_examples and corrects the card's account of the quotation right (v2#110, 1A). Needs the code in the wikivoyage PR (#141). Text and labels are unchanged (1,818 documents).
Sidecar: each line gains title, url, permalink, history_url, license_urls and conversion. The build recorded no revision id; permalink is the page's last revision in the stub dump, which comes from the same dump run as the build. The fetcher now checks that each row's credit matches its page title in the stub.
Card: the reason the fetcher drops quotations now reads that the quotation right (Art. 29) holds for a quotation inside the entry it illustrates, and that releasing the example sentences without their definitions takes it out of that context. It used to say the right "does not pass to a corpus". The card also documents the new fields.
Tests: test_wiktionary_examples_contract passes with this data and the code PR. README, CHANGELOG and totals are left to v2#80.
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refs/pr/143 ref