How to resolve pip downloads as dependencies in build info?

### How can we help?

I run `jf pip download XY` in my pipeline and the packages are also downloaded correctly. However, the packages (and their dependencies) do not show up in my build info, what do I need to do to make this happen?

The issue names no repository file, test, or entry point. Start by reproducing `jf pip download XY` in a pipeline and trace how package and dependency metadata is collected into build info. Done means documenting the required integration steps or identifying the missing support clearly.

Written by the indexing model from the issue text.