API GW trace is not being logged

Hello,

we are using API GW which runs `service_agent: "ESPv2/2.41.0"`. Unfortunately, we don't see trace id being logged into GCP standard logging.

In our setup GLB -≥ API GW -> Cloud Run

We see GLB trace in our logs and same for Cloud Run. Api GW is missing. According this [documentation](https://cloud.google.com/load-balancing/docs/https#target-proxies) GLB adds Traicing context. So it seems that API GW is not logging this information. I think that it is really key to have it present.

Do we need to somehow enable it?
Is there a way how to pass startup options when using it as a API Gateway?