LangGraph console agent with instrumentation sample

[aabmass]

This sample has region tags to go in the public docs. It is a CLI based LangGraph agent that is manually instrumented for Cloud Obs. The devsite docs will be recipe focused like

• Add dependencies
• Add instrumentation
• Add manual spans

[snippet-bot]

Here is the summary of changes.

You are about to add 2 region tags.

• samples/langgraph-sql-agent/agent.py:115, tag opentelemetry_langgraph_agent_span
• samples/langgraph-sql-agent/main.py:41, tag opentelemetry_langgraph_otel_setup

---

This comment is generated by snippet-bot.
If you find problems with this result, please file an issue at:
https://github.com/googleapis/repo-automation-bots/issues.
To update this comment, add snippet-bot:force-run label or use the checkbox below:

• Refresh this comment