feat: add Cloudflare Workers API proxy for Cloud Run

Proxies api.trycheatcode.com to Cloud Run backend via Cloudflare edge.
This bypasses Cloud Run domain mapping limitations in asia-south1
and provides Cloudflare DDoS protection.

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

Co-Authored-By: Claude <[email protected]>

Author: iamjr15

api-worker/.gitignore

@@ -0,0 +1,4 @@
+node_modules/
+dist/
+.wrangler/
+.dev.vars