log an error if the recipe wrapper recieves a message that is not a recipe (#163)

Author: stephen-riggs

src/workflows/recipe/__init__.py

@@ -1,6 +1,7 @@
 from __future__ import annotations
 
 import functools
+import logging
 from collections.abc import Callable
 from typing import Any
 
@@ -16,6 +17,8 @@
     "wrap_subscribe_broadcast",
 ]
 
+logger = logging.getLogger("workflows.recipe")
+
 
 def _wrap_subscription(
     transport_layer,
@@ -76,6 +79,10 @@ def unwrap_recipe(header, message):
         #                    "First 1000 characters of header:\n%s\n" + \
         #                    "First 1000 characters of message:\n%s",
         #                    str(header)[:1000], str(message)[:1000])
+        logger.error(
+            "The input to this service is not a wrapped recipe. "
+            "Unable to process incoming message."
+        )
         transport_layer.nack(header)
 
     if mangle_for_receiving: