[Feature Request] Add Health Check Endpoint

[vincentkoc]

Description

Add comprehensive health check endpoints for monitoring and load balancing.

Endpoints to Add

1. /health - Basic health check (existing, enhance)
2. /health/ready - Readiness probe
3. /health/live - Liveness probe

Health Checks

Each endpoint should check:

• API connectivity to Opik
• Authentication status
• Resource availability
• Transport status

Implementation

app.get('/health', (req, res) => {
  res.json({ status: 'ok', timestamp: Date.now() });
});

app.get('/health/ready', async (req, res) => {
  const checks = {
    api: await checkApiConnectivity(),
    auth: await checkAuthentication(),
    transport: checkTransportStatus()
  };
  
  const ready = Object.values(checks).every(c => c.status === 'ok');
  res.status(ready ? 200 : 503).json({
    ready,
    checks,
    timestamp: Date.now()
  });
});

app.get('/health/live', (req, res) => {
  res.json({ alive: true, uptime: process.uptime() });
});

Tasks

• Enhance existing /health endpoint
• Add /health/ready endpoint
• Add /health/live endpoint
• Implement API connectivity check
• Implement authentication check
• Add detailed status information
• Add tests
• Document endpoints

Use Cases

• Kubernetes liveness/readiness probes
• Load balancer health checks
• Monitoring systems
• Debugging connectivity issues