fix(slack): include status field in integration API response

- Add missing status field to GET /api/v2/slack/integration response
- Ensures 're_install_required' status reaches the UI for yellow button display
- Critical fix for scope validation feature to work end-to-end

Co-Authored-By: Dallin Bentley <dallinbentley98@gmail.com>

apps/server/src/api/v2/slack/handler.ts

@@ -247,6 +247,7 @@ export class SlackHandler {
 
       return c.json<GetIntegrationResponse>({
         connected: status.connected,
+        status: status.status,
         integration: status.integration
           ? {
               id: status.integration.id,