Resolve "Dynamic Model Fan Out"

What does this merge request do and why?

See motivation in the issue here:

https://gitlab.com/gitlab-org/modelops/applied-ml/code-suggestions/prompt-library/-/issues/56

How to set up and validate locally

If run on DataFlow there will be a graph produces when the jobs are run. If the graph looks anything like the one in the issue then we probably did it right. Also worth checking that the output is correct too, that sort of things matters.

Merge request checklist

• Tests added for new functionality. If not, please raise an issue to follow up.
  • I am honestly not even sure how to test this.
• Documentation added/updated, if needed.

Closes #56 (closed)