feat: include accountId in aws_guardduty_context (#1404)

Co-authored-by: Ariel Ropek <[email protected]>

global_helpers/panther_aws_helpers.py

@@ -49,6 +49,7 @@ def aws_guardduty_context(event: dict):
         "type": event.get("type", "<MISSING TYPE>"),
         "resource": event.get("resource", {}),
         "service": event.get("service", {}),
+        "accountId": event.get("accountId", "<MISSING ACCOUNT ID>"),
     }