fix

streams-events/app/utils.py

@@ -1,5 +1,6 @@
 import dictdiffer
 from arnparse import arnparse
+from aws_lambda_powertools.shared.json_encoder import Encoder
 
 
 def table_from_arn(arn: str) -> str:
@@ -17,3 +18,10 @@ def diff(first: dict, second: dict) -> list[str]:
             changed.append(path)
 
     return changed
+
+
+class JSONEncoder(Encoder):
+    def default(self, obj):
+        if isinstance(obj, set):
+            return list(obj)
+        return super(__class__, self).default(obj)