Updates across multiple docs to reflect the new message-level compression
with TOIN + CCR integration:
- docs/ccr.md: Add CCR-enabled components table, message-level CCR section
- docs/ARCHITECTURE.md: Expand Transform 6 with TOIN + CCR integration details
- docs/configuration.md: Add CCR integration config and marker format
- docs/proxy.md: Add CCR integration note for context management
- docs/README.md: Update to reference IntelligentContextManager as default
Also adds examples/test_intelligent_context_toin_ccr.py for scale testing
the TOIN + CCR integration with real API calls.