docs: update README and CLAUDE.md to v2.2.0

- Added documentation for audit tracking (IP address, invocation method).
- Updated database model descriptions for enhanced WorkOrder and Conversation fields.
- Documented the new UnifiedConfig system.
- Reflected enhanced logging transparency for knowledge base parsing.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/core/query_optimizer.py

@@ -90,7 +90,9 @@ class QueryOptimizer:
                         'assistant_response': conv.assistant_response,
                         'timestamp': conv.timestamp.isoformat() if conv.timestamp else None,
                         'confidence_score': conv.confidence_score,
-                        'work_order_id': conv.work_order_id
+                        'work_order_id': conv.work_order_id,
+                        'ip_address': conv.ip_address,
+                        'invocation_method': conv.invocation_method
                     })
                 
                 # 记录查询时间