Add better stats thread error handling

[teon]

Any error makes stats thread stop:

<11>1 2024-12-16T10:42:01+01:00 hyadum1.teonite.net defguard-gateway 8951 - [meta sequenceId="147"] Stats thread terminated with error: status: Internal, message: "protocol error: received message with invalid compression flag: 71 (valid flags are 0 and 1) while receiving response with status: 504 Gateway Timeout", details: [], metadata: MetadataMap { headers: {"content-type": "text/plain; charset=utf-8", "content-length": "15", "date": "Mon, 16 Dec 2024 10:42:01 GMT"} }