[Feature Request]: The API node's result url should be in the outputs as well.

### Feature Idea

In the [PR#8102](https://github.com/comfyanonymous/ComfyUI/pull/8102) we have make some changes to the API Nodes, now it can display result url in the API nodes,


Today a user came to me and said that the result URL should also have a string output.
When there was no native support for the API nodes, he used to develop his own custom nodes, and he needs to process the string in the subsequent workflow.

In his workflow, he will save each string for batch video generation.

### Existing Solutions

_No response_

### Other

_No response_