IntelligentContext is a message-level compressor that drops low-value
messages. This change adds bidirectional TOIN integration:
- Dropped messages stored in CCR for potential retrieval
- Drops recorded to TOIN for cross-user learning
- Retrieval feedback improves future importance scoring
When messages are dropped and users retrieve them via CCR, TOIN learns
to score those patterns higher next time. This creates a feedback loop
that improves drop decisions across all users.
Changes:
- Add _create_message_signature() for TOIN pattern tracking
- Add _get_compression_store() for CCR integration
- Add _store_dropped_in_ccr() to store dropped messages
- Add _record_drops_to_toin() to record drops for learning
- Update marker to include CCR reference when available
- Update docs with TOIN + CCR integration section
- Update tests to accept both marker formats
