feat(sdk/python): surface cloud_vendor and cloud_product on InfoResponse

Expose the two AppInfo proto fields (15, 16) added on dstack OS >= 0.5.7
so Python callers can identify the cloud provider that hosts the CVM.
Both default to empty string for backward compatibility with older guest
agents that omit them.

Mirrors the JS SDK change in f5ad5be.

Author: Leechael

sdk/python/src/dstack_sdk/dstack_client.py

@@ -260,6 +260,10 @@ class InfoResponse(BaseModel, Generic[T]):
     key_provider_info: str
     compose_hash: str
     vm_config: str = ""
+    # Cloud provider sys_vendor (e.g. "Google"). Available on dstack OS >= 0.5.7.
+    cloud_vendor: str = ""
+    # Cloud provider product_name (e.g. "Google Compute Engine"). Available on dstack OS >= 0.5.7.
+    cloud_product: str = ""
 
     @classmethod
     def parse_response(cls, obj: Any, tcb_info_type: type[T]) -> "InfoResponse[T]":

sdk/python/tests/test_client.py

@@ -83,6 +83,10 @@ def check_info_response(result: InfoResponse):
     assert len(result.tcb_info.device_id) == 64
     assert len(result.tcb_info.app_compose) > 0
     assert len(result.tcb_info.event_log) > 0
+    # Cloud provider fields available on dstack OS >= 0.5.7. Older OS or the
+    # simulator may omit them; the attribute must still exist and be a str.
+    assert isinstance(result.cloud_vendor, str)
+    assert isinstance(result.cloud_product, str)
 
 
 @pytest.mark.asyncio