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/tests/test_knowledge_rag_service.py

@@ -0,0 +1,95 @@
+from __future__ import annotations
+
+from app.services import knowledge_rag as knowledge_rag_module
+from app.services.knowledge_rag import KnowledgeRagService
+
+
+def test_build_hits_prioritizes_structured_table_evidence_for_standard_queries() -> None:
+    hits = KnowledgeRagService._build_hits_from_query_data(
+        query="住宿费标准是多少？",
+        chunks=[
+            {
+                "chunk_id": "plain-1",
+                "file_path": "/tmp/doc-1__差旅制度.md",
+                "content": "住宿费说明文字，提到了出差和报销要求，但没有清晰表格。",
+            },
+            {
+                "chunk_id": "table-1",
+                "file_path": "/tmp/doc-1__差旅制度.md",
+                "content": "# 结构化表格补充\n\n| 城市 | 住宿费标准 |\n| 北京 | 500 |",
+            },
+        ],
+        entities=[],
+        limit=2,
+    )
+
+    assert [item["candidate_id"] for item in hits] == ["table-1", "plain-1"]
+
+
+def test_build_hits_boosts_query_term_matches() -> None:
+    hits = KnowledgeRagService._build_hits_from_query_data(
+        query="招待费报销标准",
+        chunks=[
+            {
+                "chunk_id": "travel-1",
+                "file_path": "/tmp/doc-1__费用制度.md",
+                "content": "差旅费包含交通费、住宿费和餐补标准。",
+            },
+            {
+                "chunk_id": "ent-1",
+                "file_path": "/tmp/doc-1__费用制度.md",
+                "content": "业务招待费报销标准：应结合客户接待场景、人数和审批要求执行。",
+            },
+        ],
+        entities=[],
+        limit=2,
+    )
+
+    assert [item["candidate_id"] for item in hits] == ["ent-1", "travel-1"]
+
+
+def test_build_hits_prioritizes_answer_clue_appendix_for_rule_queries() -> None:
+    hits = KnowledgeRagService._build_hits_from_query_data(
+        query="报销时限是多少？",
+        chunks=[
+            {
+                "chunk_id": "plain-1",
+                "file_path": "/tmp/doc-1__费用制度.md",
+                "content": "本制度用于规范报销流程，员工应遵守公司审批要求。",
+            },
+            {
+                "chunk_id": "clue-1",
+                "file_path": "/tmp/doc-1__费用制度.md",
+                "content": (
+                    "# 问答线索补充\n\n"
+                    "- 第二章 报销时限：费用发生后 30 日内提交申请。\n"
+                    "- 第二章 报销时限：超过 30 日需补充审批说明。"
+                ),
+            },
+        ],
+        entities=[],
+        limit=2,
+    )
+
+    assert [item["candidate_id"] for item in hits] == ["clue-1", "plain-1"]
+
+
+def test_resolve_default_qdrant_url_prefers_container_host(monkeypatch) -> None:
+    monkeypatch.setattr(
+        knowledge_rag_module.socket,
+        "getaddrinfo",
+        lambda hostname, port: [("family", "type", "proto", "canonname", ("172.21.0.2", 0))]
+        if hostname == "qdrant"
+        else [],
+    )
+
+    assert knowledge_rag_module._resolve_default_qdrant_url() == "http://qdrant:6333"
+
+
+def test_resolve_default_qdrant_url_falls_back_to_loopback(monkeypatch) -> None:
+    def raise_lookup_error(_hostname, _port):
+        raise OSError("lookup failed")
+
+    monkeypatch.setattr(knowledge_rag_module.socket, "getaddrinfo", raise_lookup_error)
+
+    assert knowledge_rag_module._resolve_default_qdrant_url() == "http://127.0.0.1:6333"