Update VERSION to 0.2.0 and mark settings cascade complete in roadmap

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

ROADMAP.md

@@ -1,6 +1,6 @@
 # Switchboard Core — Roadmap
 
-## Current: v0.1.0 — The Kernel
+## Current: v0.2.0 — SDK & Triggers
 
 Fork of chat-switchboard, gutted to a pure extension platform. All AI/chat
 features removed from the kernel. What remains is the minimum viable
@@ -16,7 +16,7 @@ platform that extensions build on.
 - **Realtime**: WebSocket hub, presence, multi-replica HA
 - **Ops**: audit log, notifications, maintenance goroutine
 
-### Phase 0 (in progress)
+### Phase 0 (complete)
 
 | Step | Status | Description |
 |------|--------|-------------|
@@ -39,7 +39,7 @@ SDK stabilization, and the first rebuilt extension (tasks).
 | Step | Status | Description |
 |------|--------|-------------|
 | Admin → RBAC group | ✅ | `surface.admin.access` permission + Admins system group replaces `role == "admin"` checks. Admin bypass removed from permission middleware. |
-| Settings cascade | 🔲 | `user_overridable` flag, RBAC scope auth, resolution chain |
+| Settings cascade | ✅ | `user_overridable` flag, three-tier resolution (global → team → user), team settings API |
 | ICD (API contract) | 🔲 | OpenAPI spec from registered routes, kernel-only endpoint docs |
 | Trigger system | 🔲 | Time (cron), webhook (inbound HTTP), event (bus subscription) |
 | SDK stabilization | 🔲 | `sb.slots()`, `sb.actions`, `sb.api.ext()`, `sb.storage`, theme tokens, primitive UI |
@@ -49,11 +49,7 @@ SDK stabilization, and the first rebuilt extension (tasks).
 - **Event bus subscriptions**: extensions register match expressions at install time
 - **Task extension**: first proof-of-concept — full task system rebuilt as a
   Starlark extension using triggers + ext_data + notifications
-- **Settings override model**: RBAC controls scope auth (admin → global,
-  team-admin → team, user → personal). `user_overridable` flag on each setting
-  controls whether lower scopes can override higher. Resolution order:
-  user → team → global (first non-null wins, walking up if overridable).
-  Extension manifests declare `user_overridable` per setting key.
+- ~~**Settings override model**~~: ✅ shipped with settings cascade above
 - **Default surface routing**: `/` redirects to configurable default surface.
   No surfaces installed → admin surface is default. First surface installed
   becomes default. Changeable in admin settings.