Integrated into release/v3.8.26 — reconciled: kept #3900's superset wiki-sync, dropped the superseded sync-wiki-home; counts taken from the newer canonical release docs; net-new value = vale/markdownlint docs-lint infra + 7 new docs (Notion/Obsidian/Plugin-Marketplace/Cost-Tracking/Free-Provider-Rankings/Feature-Flags/Egress-Policy) + check-docs-counts-sync guard.