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

server/src/app/models/system_setting.py

@@ -40,6 +40,11 @@ class SystemSetting(Base):
     embedding_provider: Mapped[str] = mapped_column(String(64), default="GLM")
     embedding_model: Mapped[str] = mapped_column(String(255), default="Embedding-3")
     embedding_endpoint: Mapped[str] = mapped_column(String(512), default="https://open.bigmodel.cn/api/paas/v4/")
+    reranker_provider: Mapped[str] = mapped_column(String(64), default="Ali")
+    reranker_model: Mapped[str] = mapped_column(String(255), default="gte-rerank-v2")
+    reranker_endpoint: Mapped[str] = mapped_column(
+        String(512), default="https://dashscope.aliyuncs.com/api/v1/services/rerank/text-rerank/text-rerank"
+    )
     onlyoffice_enabled: Mapped[bool] = mapped_column(Boolean, default=False)
     onlyoffice_public_url: Mapped[str] = mapped_column(String(512), default="")
 

server/src/app/models/system_setting_secret.py

@@ -18,6 +18,7 @@ class SystemSettingSecret(Base):
     backup_api_key_encrypted: Mapped[str] = mapped_column(Text, default="")
     vlm_api_key_encrypted: Mapped[str] = mapped_column(Text, default="")
     embedding_api_key_encrypted: Mapped[str] = mapped_column(Text, default="")
+    reranker_api_key_encrypted: Mapped[str] = mapped_column(Text, default="")
     onlyoffice_jwt_secret_encrypted: Mapped[str] = mapped_column(Text, default="")
     smtp_password_encrypted: Mapped[str] = mapped_column(Text, default="")