[code_review] Check if the number of comments asking to verify something impacted by rephrasing the prompt

Could you check if the number of comments asking to verify something exists are more or less the same before/after the change (by using a LLM, even if not perfect)? Perhaps this could be an additional metric in the evaluation? Maybe file a follow-up for this

Originally posted by @marco-c in https://github.com/mozilla/bugbug/pull/5019#discussion_r2106940345