Creates one or more key results for a specific goal.
Each key result will be created with the specified title, measureBy properties, and automatically associated with the given goal.

Limitations:
- You can create up to 25 key results per request.
- If the request includes more than 25 items, it will return a 400 error.

The response includes an array of the created key result IDs.
If any key result fails to be created, a structured error response will be returned with details for each failed item.

Testing notes:
- Use the testing widget's Try It! option to test this endpoint.
- Use the Examples > Request Example option to see how to initiate body parameters.