IsIdentifiable may generate messages that cause CohortPackager to crash

[rkm]

Specifically when an exception is generated here:

SmiServices/src/microservices/Microservices.IsIdentifiable/Service/IsIdentifiableQueueConsumer.cs

Line 68 in e5da6b3

SendVerificationMessage(statusMessage, header, tag, VerifiedFileStatus.ErrorWontRetry, $"Exception while classifying {statusMessage.GetType().Name}:\n{e}. File could not be scanned.");

The verification message report content is not a JSON blob of failure data but is a serialised exception message. CohortPackager does not handle this case though:

SmiServices/src/microservices/Microservices.CohortPackager/Messaging/AnonVerificationMessageConsumer.cs

Lines 77 to 86 in e5da6b3

	try
	{
	// Check the report contents are valid here, since we just treat it as a JSON string from now on
	_ = JsonConvert.DeserializeObject<IEnumerable<Failure>>(message.Report);
	}
	catch (JsonException e)
	{
	ErrorAndNack(header, tag, "Could not deserialize message report to Failure object", e);
	return;
	}