feat: 重构知识库系统，移除Hermes集成，增强RAG和同步功能

主要变更:
- 移除Hermes智能体及相关回调服务
- 新增知识库RAG、同步、调度、规范化和索引任务服务
- 重构orchestrator服务，增强运行时聊天功能
- 更新前端聊天、政策制度、设置等页面样式和逻辑
- 更新expense_claims和document_intelligence服务
- 删除llm_wiki相关服务和测试文件
- 更新docker-compose配置和启动脚本

.tmp/lightrag_inspect/lightrag_pkg/lightrag/evaluation/__init__.py

@@ -0,0 +1,25 @@
+"""
+LightRAG Evaluation Module
+
+RAGAS-based evaluation framework for assessing RAG system quality.
+
+Usage:
+    from lightrag.evaluation import RAGEvaluator
+
+    evaluator = RAGEvaluator()
+    results = await evaluator.run()
+
+Note: RAGEvaluator is imported lazily to avoid import errors
+when ragas/datasets are not installed.
+"""
+
+__all__ = ["RAGEvaluator"]
+
+
+def __getattr__(name):
+    """Lazy import to avoid dependency errors when ragas is not installed."""
+    if name == "RAGEvaluator":
+        from .eval_rag_quality import RAGEvaluator
+
+        return RAGEvaluator
+    raise AttributeError(f"module {__name__!r} has no attribute {name!r}")