Set og:type to article so Pinterest's Rich Pin validator finds one

[Robbie1977]

Pinterest only recognises og:type "article" or "blog" as Rich-Pin eligible; the preview page was sending "website", which Pinterest never treats as a Rich Pin no matter what other og:/twitter: tags are present — that's why the validator said "We were not able to find a Rich Pin!" even though the ordinary preview (title/description/image) was already working everywhere else (Slack, Facebook, Discord, Bluesky don't gate on og:type the same way).

Also adds article:section (the term kind — class/individual/template/term), which Pinterest lists as optional-but-useful and costs nothing to include. og:site_name was already present and is the other tag Pinterest strongly recommends.

New test added (test_page_qualifies_for_pinterest_article_rich_pin); all 39 tests pass.

[github-actions]

⚠️ 162 test(s) skipped — an upstream data source was unreachable

The full suite ran, but 162 test(s) were skipped because an upstream data source (VFB's Neo4j / SOLR / Owlery, or FlyBase's Chado) did not answer during this run.

These are not failures and not a problem with this branch — but those queries went unverified, so a green check here is an incomplete run.

To re-run: open this workflow run and click Re-run all jobs once the data sources are healthy (re-running the “Run completeness” check itself does nothing — it has no job behind it).

1 failed, 726 passed, 162 skipped, 338 warnings in 830.60s (0:13:50)

_{Posted automatically. This comment is removed once a run completes with zero skips.}