Implement API Rate Limiting

Write rate limiting middleware for a [FRAMEWORK] REST API.

Requirements:
- Framework: [EXPRESS / FASTAPI / GIN / HONO / etc.]
- Rate limit strategy: [FIXED WINDOW / SLIDING WINDOW / TOKEN BUCKET]
- Limits: [X requests per Y minutes per IP / per API key]
- Storage: [IN-MEMORY / REDIS]
- Response when limit exceeded: 429 status with Retry-After header
- Different limits for: [AUTHENTICATED vs UNAUTHENTICATED users, if applicable]

Include:
1. The middleware implementation
2. How to apply it globally and to specific routes
3. Example of setting different limits per route
4. Redis setup instructions if using Redis
5. Testing the rate limiter with a simple script