Add stripe integration

backend/src/types.ts

@@ -22,6 +22,8 @@ export type WorkspaceRow = {
   billing_email: string | null;
   billing_plan: BillingPlan;
   subscription_status: SubscriptionStatus;
+  stripe_customer_id: string | null;
+  stripe_subscription_id: string | null;
   rescue_verification_status: RescueVerificationStatus;
   created_at: string;
   updated_at: string;