(#123) Add more logging for HeaderDeserializer

src/RawRabbit/Pipe/Middleware/HeaderDeserializationMiddleware.cs

@@ -72,10 +72,17 @@ protected virtual byte[] GetHeaderBytes(IPipeContext context)
 			var args = GetDeliveryArgs(context);
 			if (string.IsNullOrEmpty(headerKey))
 			{
+				_logger.LogDebug($"Key '{headerKey}' not found.");
 				return null;
 			}
 			if (args == null)
 			{
+				_logger.LogDebug("DeliveryEventArgs not found.");
+				return null;
+			}
+			if (!args.BasicProperties.Headers.ContainsKey(headerKey))
+			{
+				_logger.LogInformation($"BasicProperties Header does not contain '{headerKey}'");
 				return null;
 			}
 
@@ -116,6 +123,10 @@ protected virtual Type GetHeaderType(IPipeContext context)
 			{
 				_logger.LogWarning("Unable to extract header type from Pipe context.");
 			}
+			else
+			{
+				_logger.LogDebug($"Header type extracted: '{type.Name}'");
+			}
 			return type;
 		}