Database URL should be stored in environment variables, not hardcoded

[hatemhenchir]

The current implementation of the Xata client hardcodes the databaseURL:

const defaultOptions = { databaseURL: "https://..............................", apiKey: process.env.XATA_API_KEY, branch: "main", };

This is problematic because:

• It leaks workspace details publicly.
• It reduces flexibility for different environments (development, staging, production).
• It violates best practices for managing secrets and config values.

Use an environment variable instead to store the database url