refactor(backend): register ontology and orchestrator routers

- router.py: import and register ontology_router and orchestrator_router
- openapi.py: add ontology and orchestrator tags to OpenAPI documentation
- agent_runs.py: extend agent runs service with additional functionality
- test_openapi_schema.py: update OpenAPI schema tests

server/src/app/core/openapi.py

@@ -27,6 +27,8 @@ X-Financial 后端 OpenAPI 文档。
 - 员工目录
 - 报销单
 - 知识库与 ONLYOFFICE
+- 语义本体解析
+- Orchestrator 统一调度
 - 系统设置与模型连通性
 - Agent 资产、运行日志、审计日志
 """.strip()
@@ -57,6 +59,14 @@ OPENAPI_TAGS = [
         "name": "knowledge",
         "description": "知识库文件管理、内容访问与 ONLYOFFICE 集成接口。",
     },
+    {
+        "name": "ontology",
+        "description": "Day 3 语义本体解析接口，把自然语言问题稳定转换为 8 个核心字段。",
+    },
+    {
+        "name": "orchestrator",
+        "description": "Day 4 Orchestrator 统一入口，负责语义、权限、路由、工具调用和降级。",
+    },
     {
         "name": "settings",
         "description": "系统设置、模型配置、模型连通性探测和 Hermes 运行时模型配置。",