fix(base-partial): append record instead of entry

Author: gmcrocetti

aws_lambda_powertools/utilities/batch/base.py

@@ -72,5 +72,5 @@ def failure_handler(self, record, exception):
         Failure callback
         """
         entry = ("fail", exception.args, record)
-        self.fail_messages.append(entry)
+        self.fail_messages.append(record)
         return entry