feat: add ens-app-v3.pages.dev to allowed CORS origins

Allow ENS App v3 preview sites to access the avatar worker in production.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: storywithoutend

src/index.ts

@@ -8,6 +8,7 @@ const PROD_ALLOWED_ORIGIN_SUFFIXES = [
   "ens.domains",
   "ens.dev",
   "ens-cf.workers.dev",
+  "ens-app-v3.pages.dev"
 ] as const;
 
 const app = createApp();