docs: update changelog with session 2 changes

CHANGELOG.md

@@ -10,6 +10,19 @@
 - 13 seeded product tiers from base to enterprise
 - DLID-gated update XML endpoint: GET /api/v1/licensing/updates/{product}.xml
 - Profile repo fallback chain: .mokogitea > .profile > .github
+- Metadata/manifest GET endpoint publicly accessible without auth (#676)
+- Org wiki: folder-based collapsible tree sidebar, _Sidebar.md overrides (#680)
+- Wiki backlinks: "What links here" page showing all pages referencing current page (#669)
+- Wiki wikilinks: [[Page Name]] and [[Page|Display Text]] syntax with red links for missing pages (#666)
+- Required baseline issue statuses: Open and Closed are indestructible (is_required flag) (#681)
+- Issue status API response includes is_required field
+
+### Fixed
+- Metadata settings template 500 error: removed reference to deleted Version field
+
+### Changed
+- Issue status seed defaults: Open, In Progress, Waiting, In Review, Closed, Won't Fix
+- Pre-release workflow: auto-bump skipped for non-Joomla repos (platform check)
 
 ## [06.19.00] --- 2026-06-20