[Bug]: DIST-S1 uncapped unsubmitted granules

[chrisjrd]

Checked for duplicates

Yes - I've already checked

Describe the bug

When unsubmitted jobs accumulate, the unbound query for unsubmitted granules causes jobs to timeout.

What did you expect?

I expected only more recent/relevant unsubmitted granules to be taken into consideration

Reproducible steps

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Environment

- Version of this software [e.g. vX.Y.Z]
- Operating System: [e.g. MacOSX with Docker Desktop vX.Y]
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