release: v3.3.0 — platform hardening & admin unification (Track F.1–F.8)

Plugin visibility control, UI/UX fixes, unified admin panel,
database-backed settings, and security hardening.

Highlights:
- ENABLED_PLUGINS env var for plugin visibility (F.1)
- Admin designation via ADMIN_EMAILS (F.4a)
- Master key scope control (F.4b)
- Panel unification + settings from UI (F.4c)
- exec() removal, shell injection fix, bcrypt migration (F.8)
- 5 new test suites

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

core/oauth/client_registry.py

@@ -98,7 +98,7 @@ class ClientRegistry:
             client_name=client_name,
             redirect_uris=redirect_uris,
             grant_types=grant_types or ["authorization_code", "refresh_token"],
-            allowed_scopes=allowed_scopes or ["read", "write"],
+            allowed_scopes=allowed_scopes or ["read", "write", "admin"],
             metadata=metadata or {},
             owner_user_id=owner_user_id,
         )