feat: add namespace into sandbox status response (alibaba#280)

Author: FangwenDave

rock/admin/proto/response.py

@@ -27,6 +27,7 @@ class SandboxStatusResponse(BaseModel):
     swe_rex_version: str | None = None
     user_id: str | None = None
     experiment_id: str | None = None
+    namespace: str | None = None
     cpus: float | None = None
     memory: str | None = None