Add LangChain Observability and Debugging

[jethronap]

Integrate LangSmith tracing and debugging capabilities for better development and production monitoring.

Set up LangSmith project and API integration
Add tracing to all agent operations and tool calls
Create debug logging for LangChain chains and tools
Implement error tracking and performance metrics
Add development debugging tools and utilities
Create monitoring dashboard for production usage
Document debugging and troubleshooting procedures

Files to Create/Modify:

• src/observability/langsmith_config.py (new)
• Update all agent and tool files with tracing decorators
• docs/debugging.md (new)