fix(core): Remove circular references before serializing executions in public API (#8043)

## Summary
Handle circular references in the public API for executions created
prior to the fix from #8030

## Related tickets
[PAY-1119](https://linear.app/n8n/issue/PAY-1119)

## Review / Merge checklist
- [x] PR title and summary are descriptive.

packages/workflow/src/index.ts

@@ -28,6 +28,7 @@ export {
 	deepCopy,
 	jsonParse,
 	jsonStringify,
+	replaceCircularReferences,
 	sleep,
 	fileTypeFromMimeType,
 	assert,