feat(seo): complete structured data entity graph

[nibzard]

What changed

• add stable Organization, WebSite, and page-level WebPage JSON-LD entities
• connect integration and cookbook TechArticle schema to shared page and publisher IDs
• keep cookbook author profiles specialized without a duplicate generic page entity
• use Git-only modification dates for article freshness while preserving sitemap filesystem fallback
• update the Steel Twitter metadata to @steeldotdev
• add unit and rendered-HTML regression coverage across homepage, docs, integrations, recipes, and author profiles

Why

The docs already emitted breadcrumbs and several specialized schema types, but they were disconnected: the homepage had no site identity graph, ordinary docs had no page entity, and article references pointed at page entities that were not emitted. This completes a coherent graph without changing visible page construction or inventing freshness dates.

/changelog remains unchanged because it is a redirect to the latest entry, not a standalone listing page.

Validation

• bun test — 296 passed
• bun run check --error-on-warnings
• bun run typecheck
• bun run validate-links
• bun run build
• git diff --check

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Project	Deployment	Actions	Updated (UTC)
docs	Ready	Preview	Jul 30, 2026 5:57pm