Issue 2: Validator approved a clear non-answer

[sanjaigridsandguides]

Problem

• For FAQ 4 ("Who is your favourite actor?") the saved answer is the LLM's disclaimer:

  "I don't have personal preferences or feelings, so I don't have a favourite actor. I can provide information about various actors..."

• The validator marked this is_valid=true with iterationCount=1.

Impact

• The validator is failing exactly the case it exists to catch: an answer that does not address the question.
• The bar for "valid" is far too low — any well-formed English sentence currently passes.

Required Fix

• Add an explicit rule: "If the answer is a disclaimer or refusal to answer, set is_valid=false."
• Add an explicit rule: "If the answer does not directly state a fact answering the question, set is_valid=false."