feat: whether or not to handle (e.g. sending an event) themis auth failures (besides ignoring the failure)

https://github.com/xmidt-org/xmidt-agent/blob/1b1515e57b8e501ad1daca5e730ccfc3cc10be58/internal/websocket/ws.go#L205-L206

Provide feedback

	// If auth fails, then continue with openfail xmidt connection
	ws.credDecorator(ws.additionalHeaders)