Health checks for TLS Secrets

[Satwick Dash]

Hi,

We're using envoy as a container for outbound requests from a pod. We're also using transport_socket.tls.v3.Secret for the certificates stored in a K8s secret.

Is there a way we can check the health of running envoy instance, to see if we're facing TLS errors, due to empty certificates? Specifically errors like - 

```
[2025-10-08 07:56:32.875][22][debug][pool] [source/common/conn_pool/conn_pool_base.cc:495] [Tags: "ConnectionId":"1"] client disconnected, failure reason: TLS error: Secret is not supplied by SDS [2025-10-08 07:56:32.875][22][debug][router] [source/common/router/router.cc:1355] [Tags: "ConnectionId":"0","StreamId":"15292288025689618954"] upstream reset: reset reason: remote connection failure, transport failure reason: TLS error: Secret is not supplied by SDS
```

Is there a way we can check for these errors via a livenessProbe / readinessProbe?

Thanks in advance!