fix: fixes klaviyo events columns error

airbyte-integrations/connectors/source-klaviyo/source_klaviyo/streams.py

@@ -4,6 +4,7 @@
 
 import datetime
 from abc import ABC, abstractmethod
+import json
 from typing import Any, Iterable, List, Mapping, MutableMapping, Optional, Union
 
 import pendulum
@@ -248,6 +249,25 @@ def path(self, **kwargs) -> str:
         return "metrics"
 
 
+FLATTEN_LEVELS: int = 2
+
+
+def process_record(record):
+    processed_record = record
+
+    # Recursively traverse record dict and string-ify all json values in the 3rd level
+    def flatten_dict(rec, level):
+        for key, value in rec.items():
+            if isinstance(value, dict):
+                if level > FLATTEN_LEVELS:
+                    rec[key] = json.dumps(value)
+                else:
+                    flatten_dict(value, level + 1)
+
+    flatten_dict(processed_record, 1)
+    return processed_record
+
+
 class Events(IncrementalKlaviyoStream):
     """Docs: https://developers.klaviyo.com/en/reference/metrics-timeline"""
 
@@ -269,7 +289,7 @@ def parse_response(self, response: requests.Response, **kwargs) -> Iterable[Mapp
             record["flow_message_id"] = flow_message_id
             record["campaign_id"] = flow_message_id if not flow else None
 
-            yield record
+            yield process_record(record)
 
 
 class Flows(ReverseIncrementalKlaviyoStream):