feat(billing): configure Polar product ids for Pro + Premium (unblock paid checkout)

- Add POLAR_PRODUCT_ID_{PRO,PREMIUM,ULTRA,MAX} (optional) to the strict gateway env
  schema so the vars pass validation.
- Bind real Pro + Premium product ids as non-secret wrangler vars (read from the Polar
  dashboard). Ultra/Max have no Polar product yet — those tiers 503 until created.

Author: iamjr15

apps/gateway-worker/wrangler.jsonc

@@ -6,6 +6,13 @@
   "main": "src/index.ts",
   "compatibility_date": "2026-05-20",
   "compatibility_flags": ["nodejs_compat"],
+  // Polar product ids per paid tier — non-secret config (they appear in checkout URLs),
+  // bound as plain vars. Ultra/Max have no Polar product yet, so those tiers 503 until
+  // the owner creates the products and adds their ids here.
+  "vars": {
+    "POLAR_PRODUCT_ID_PRO": "c76a8fa5-ac08-4333-9cee-aa7a8a3d959c",
+    "POLAR_PRODUCT_ID_PREMIUM": "11e9b294-73e0-47f6-943c-314e53b63e6e"
+  },
   "routes": [
     {
       "pattern": "gateway.trycheatcode.com/*",

packages/env/src/worker.ts

@@ -48,6 +48,12 @@ export const GatewayWorkerEnvSchema = z
     IDEMPOTENCY: z.custom<DurableObjectNamespace>().optional(),
     INTERNAL_MAINTENANCE_SECRET: OptionalWorkerSecretSchema,
     POLAR_ACCESS_TOKEN: OptionalWorkerSecretSchema,
+    // Polar product ids per paid tier — non-secret config bound as plain wrangler vars
+    // (not secrets). Optional so a tier without a Polar product simply 503s on checkout.
+    POLAR_PRODUCT_ID_PRO: z.string().min(1).optional(),
+    POLAR_PRODUCT_ID_PREMIUM: z.string().min(1).optional(),
+    POLAR_PRODUCT_ID_ULTRA: z.string().min(1).optional(),
+    POLAR_PRODUCT_ID_MAX: z.string().min(1).optional(),
     QUOTA_TRACKER: z.custom<DurableObjectNamespace>(),
     RATE_LIMITER: z.custom<DurableObjectNamespace>(),
   })