Feat v0.2.6 admin settings audit (#10)

Co-authored-by: Jeffrey Smith <jasafpro@gmail.com>
Co-committed-by: Jeffrey Smith <jasafpro@gmail.com>

CHANGELOG.md

@@ -2,6 +2,32 @@
 
 All notable changes to Switchboard Core are documented here.
 
+## [Unreleased] — v0.2.6
+
+### Changed
+
+- **Roadmap reorder**: Extension Lifecycle moved from v0.2.6 to v0.3.x
+  (Workflows series). Settings audit milestones renumbered: v0.2.7→v0.2.6,
+  v0.2.8→v0.2.7, v0.2.9→v0.2.8. Added v0.2.9 for builtin extension
+  retirement (chat-centric extensions dormant until chat surface ships).
+
+### Removed
+
+- **Dead admin section categories** in `sectionCategory()`: AI (providers,
+  models, personas, roles, knowledgeBases, memory), routing (health, routing,
+  capabilities), and channels. Default category changed from `ai` to `system`.
+- **Dead PublicSettings fields**: `system_prompt`/`has_admin_prompt`,
+  `retention_ttl_days`, `paste_to_file_chars`, `allow_user_personas` policy
+  — all chat-era with no frontend consumers.
+- **Dead PolicyDefaults**: `allow_raw_model_access`, `default_model`.
+- **Dead policy lookups**: `allow_raw_model_access` and `kb_direct_access`
+  from profile bootstrap and permissions handlers.
+- **Dead test seed data**: `model_roles` global setting, `allow_raw_model_access`
+  policy from test helper.
+- **Dead CORE_IDS entry**: Removed `chat` from packages admin page.
+
+---
+
 ## [Unreleased] — v0.2.5
 
 ### Added