This pull request introduces PostgreSQL database integration for product data management and retrieval in the NX AI FastAPI application. The main changes include adding scripts for database setup and testing, modifying the root API endpoint to return product data, and updating documentation and metadata for clarity.

This pull request introduces PostgreSQL database integration for product data management and retrieval in the NX AI FastAPI application. The main changes include adding scripts for database setup and testing, modifying the root API endpoint to return product data, and updating documentation and metadata for clarity. #12