希望deep-research添加 问题确认机制 #2300
Description
Feature Request
当用户问一个问题，通过了CoordinatorNode节点，然后通过rewriteandMultiqueryNode节点扩展多个语义变体，但是此时我们还不确定是否理解了用户提问，我们需要求证用户扩展的语义是否正确，还需要添加其他补充条件。这样后续生成的内容才能够更加准却
Is your feature request related to a problem? Please describe
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Describe the solution you'd like
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Describe alternatives you've considered
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Additional context
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