📊 Enhanced Health Monitoring for LangGraph Assistants

[dokterbob]

📋 Overview

Implement comprehensive health monitoring system to provide detailed monitoring of LangGraph graph compilation status and performance metrics.

🎯 Tasks

• Add individual graph health checks (compilation status)
• Monitor graph execution performance and memory usage
• Add detailed health check endpoint with graph status
• Implement automatic graph recompilation on failures
• Add metrics for graph invocation count and success rate
• Create dashboard-friendly health check response format
• Add alerting for graph compilation failures

🔧 Health Check Response Format

```json
{
"status": "healthy",
"graphs": {
"chatbot": {
"status": "healthy",
"compiledAt": "2024-01-01T00:00:00Z",
"invocations": 150,
"avgResponseTime": "1.2s"
},
"code-assistant": {
"status": "healthy",
"compiledAt": "2024-01-01T00:00:00Z",
"invocations": 75,
"avgResponseTime": "2.1s"
}
},
"memory": {"usage": "250MB", "limit": "1GB"},
"performance": {"avgResponseTime": "1.2s", "p95ResponseTime": "3.1s"}
}
```

✅ Acceptance Criteria

• /health endpoint provides detailed graph status
• Individual graph health can be checked via /health/{graph_id}
• Performance metrics are tracked and exposed
• Failed graphs automatically attempt recompilation
• Health checks work in both development and production
• Metrics are compatible with monitoring systems (Prometheus, etc.)

📊 Priority

Medium - Important for production monitoring

Phase: 5 - Production Optimization