* feat: multi-turn context and conversation arc memory
PR 2E - Section 2.9, 2.10:
- Add multiTurnContext.ts with turn tracking and state preservation
- Add conversationArc.ts with goal/decision/milestone tracking
- Wire into query.ts after tool execution
- Feature-flags: MULTI_TURN_CONTEXT, CONVERSATION_ARC
- Add comprehensive tests (22 passing)
* feat(memory): resolve review blockers and integrate native Knowledge Graph into Conversation Arcs
- Fix: Extract text from production block arrays in phase detector\n- Fix: Ensure proper turn segmentation in query loop\n- Fix: Respect options in multi-turn context tracker\n- Feat: Add native Knowledge Graph (Entities/Relations) to ConversationArc architecture\n- Test: Comprehensive test suite for all fixes and new graph features
* test(perf): add automated performance benchmarks for Knowledge Graph extraction and summary
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Co-authored-by: LifeJiggy <Bloomtonjovish@gmail.com>
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