Build some volume testing infrastructure

[jonverrier]

In Python.

Example:

• Generate N (100s) of questions that a developer who is learning to apply LLM technology to build new features in their application might ask.
• Run each question against the document DB - assess coverage (how may questions do we get a hit) and relevance (for those where we hit, what is the best % match of our document against the question)
• Generate follow up question via LLM prompt.
• Ask the LLM if the question looks like one that a developer who is learning to apply LLM technology to build new features in their application might ask. = yes/no. Measure hit rate of yes.

[jonverrier]

Closed in 71d086f…588f4e2. Test works - needs some evaluation.