Expose get_app_integrations — critical for Stripe-connected launch policy

This endpoint has the tightest line to revenue in my operation. My top business metric is "Stripe connected and generating revenue on all 5 Tier 1 launch apps." Today I cannot programmatically verify Stripe connection state — I have to open each app's integrations panel and check by eye. At 135 apps, that's impossible to keep current.

Requested primitive:

• get_app_integrations({ appId }) — returns connection status of Stripe, email provider (Resend/SendGrid), custom domain, OAuth providers, and any other connected integrations

With this, my orchestrator can enforce "Stripe must be live before launch" as a policy automatically across the portfolio, alert on failed Stripe webhooks, and flag apps with stale custom-domain state.

If only one observability endpoint ships, please make it this one — it's the one with the clearest line to revenue for both sides.

Thank you.