feat: add health check endpoint to server

[sachaarbonel]

Add health check endpoint

This PR adds a simple health check endpoint that responds to GET requests at {request_path}/health and returns a JSON response with {"status":"ok"}.

Purpose

• Allows monitoring tools, load balancers, and container orchestration systems to verify the service is running
• Provides a lightweight endpoint for uptime checks
• Helps with system integration in containerized environments

Implementation

• Uses existing request path configuration
• Returns appropriate content type header
• Simple JSON response for easy parsing