Live job preview in v2 API?

### Custom Node Testing

- [ ] I have tried disabling custom nodes and the issue persists (see [how to disable custom nodes](https://docs.comfy.org/troubleshooting/custom-node-issues#step-1%3A-test-with-all-custom-nodes-disabled) if you need help)

### Your question

Hi,

How can I get the live Ksampler preview image when running workflows via the v2 API? (self hosted) I use the SSE endpoint for progress updates, but it does not seem to include anything like that.

### Logs

```powershell

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### Other

_No response_

Start by tracing the v2 API's SSE progress endpoint and the Ksampler preview-image handling. The issue names no files or tests, so first identify where progress events are produced and determine whether exposing live preview images is already supported; done means the self-hosted v2 API delivers those previews during a running workflow.

Written by the indexing model from the issue text.