Handle no downloader work gracefully.

[kurtwheeler]

Issue Number

N/A Came up during staging test

Purpose/Implementation Notes

I saw a lot of downloader jobs failing but it turns out it was just because the files they were supposed to download had already been downloaded so they passed an empty list to create_processor_jobs which wasn't ready for it.

Types of changes

• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Checklist

Put an x in the boxes that apply.

• Lint and unit tests pass locally with my changes
• I have added tests that prove my fix is effective or that my feature works
• I have added necessary documentation (if appropriate)
• Any dependent changes have been merged and published in downstream modules

[Miserlou]

I don't think these tests will run in CI unless given a tag that matches one in the config. The change itself looks good though.

[kurtwheeler]

Oh snap good catch.