demo: using scenario server and mlflow tracing with new mcp servers

[bradleyjeck]

Provide a demo notebook / script showing use of scenario server and mlfow to run scenarios through the new mcp and uv architecture.

First pass could use internally deployed SS and MLflow.

[bradleyjeck]

Currently BLOCKED because the following command is erroring:

uv run plan-execute "What assets are available at site MAIN?"