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/main.py

@@ -7,7 +7,7 @@ from datetime import datetime, timedelta
 # 添加项目根目录到Python路径
 sys.path.append(os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
 
-from src.config.config import Config
+from src.config.unified_config import get_config
 from src.utils.helpers import setup_logging
 from src.core.database import db_manager
 from src.core.llm_client import QwenClient
@@ -26,7 +26,8 @@ class TSPAssistant:
     
     def __init__(self):
         # 设置日志
-        setup_logging(Config.LOG_LEVEL, Config.LOG_FILE)
+        config = get_config()
+        setup_logging(config.server.log_level, "logs/tsp_assistant.log")
         self.logger = logging.getLogger(__name__)
         
         # 初始化各个管理器