associate job log with project, not launchers

[johrstrom]

There's something wrong here that I think I started. jobs are associated with the launchers and that's why you have to do all this weirdness here. But I think a better/simpler paradigm really is that the project itself keeps the job log and the entries have a relationship to the launcher (if we even need such a relationship).

Which is really just to say that I think we should rethink & refactor this whole paradigm before it gets worse. I think we can move forward with this as it is, but will likely have to change it almost immediately.

Originally posted by @johrstrom in #3702 (comment)