Implement Per-User Rate Limiting for LinkedIn Agent Access

[DeadmanAbir]

Implement rate limiting to the backend of our LinkedIn Agent, restricting each unique user to 2 accesses every 24 hours in the playground. This is crucial as we are providing in-house API keys for LLMs and Proxycurl, necessitating controlled usage to prevent abuse.

• Implement rate limiting logic within src/app/api/agent/route.ts
• Can use any open source external libraries as per requirement.
• Before starting provide an overall architecture, how you're going to implement this and the libraries used.

By implementing this rate-limiting feature, we enhance the security and reliability of our LinkedIn Agent backend, ensuring resources are used appropriately and service availability is maintained for all users.