zen: use balance after rate limited

packages/console/core/src/schema/billing.sql.ts

@@ -24,9 +24,10 @@ export const BillingTable = mysqlTable(
     timeReloadLockedTill: utc("time_reload_locked_till"),
     subscription: json("subscription").$type<{
       status: "subscribed"
-      coupon?: string
       seats: number
       plan: "20" | "100" | "200"
+      useBalance?: boolean
+      coupon?: string
     }>(),
     subscriptionID: varchar("subscription_id", { length: 28 }),
     subscriptionPlan: mysqlEnum("subscription_plan", SubscriptionPlan),