conversation-followups

Conversation memory and follow-up handling for the sf-intelligence org. Fire on follow-up turns that depend on what was just discussed — pronouns and ellipsis ("what about the other one?", "and on Contact?", "is that one safe to delete?", "show me its dependencies", "the second one"), refinements of a prior answer, or "what should I look at next?". Keeps the resolved component, the last tool/plane, and the…