How to upload an attachment file to a test execution via Zephyr Scale Cloud REST API?

I'm trying to upload an attachment to a test execution in Zephyr Scale using the REST API. I’ve reviewed the official API documentation (https://support.smartbear.com/zephyr-scale-cloud/api-docs/), but I couldn’t find any relevant endpoint that supports uploading attachments.

I have the following questions that I need help with:

• Does Zephyr Scale support uploading attachments to test executions via the REST API?
• If yes, what is the correct endpoint and request format?
• If not, is there any recommended workaround or alternative method to achieve this?

Any help or clarification would be greatly appreciated.

Thanks in advance!