feat(backend): add office router and agent runtime services

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

backend/app/services/agent_runtime/jarvis_runtime.py

@@ -0,0 +1,21 @@
+from __future__ import annotations
+
+from typing import Any, AsyncGenerator
+
+from app.services.agent_runtime.base import ChatRuntime, RuntimePreparedContext
+
+
+class JarvisRuntimeAdapter(ChatRuntime):
+    name = "jarvis"
+
+    async def chat_stream(
+        self,
+        prepared: RuntimePreparedContext,
+    ) -> AsyncGenerator[dict[str, Any], None]:
+        raise NotImplementedError("Jarvis runtime is executed inside AgentService")
+
+    async def chat_once(self, prepared: RuntimePreparedContext) -> tuple[str, str | None]:
+        raise NotImplementedError("Jarvis runtime is executed inside AgentService")
+
+
+jarvis_runtime_adapter = JarvisRuntimeAdapter()