Add cross-validation for total_amount_expended < limit

[tadhg-ohiggins]

Following from #3769, we may also need to catch the case where total_award_expended is some invalid amount.

We've primarily seen this in cases where there were no federal awards and total_award_expended is zero, but should we just reject if the total is below some limit, and should that limit be the same as the limit we ask submitters about in the initial steps? (Currently this is $750,000.)

[jadudm]

I believe this is safe.

There is ambiguous policy floating around the world that suggests that, for some entities, they can/must submit at a lower threshold. This has never been resolved. Therefore, we will disregard it as an "unknown/unknown."

I think it is safe to set this to the threshold. If someone thinks they should be able to submit with a spend below the SA threshold, and we prevent them... they will reach out to us.

[jperson1]

Moving this to "Blocked" for now. See the relevant Slack thread for why, but TL;DR:

Expenditures and reimbursements count against each other. If that brings the record below the threshold, we don't want to block it. How can we detect that, and is it our place to block a submission when the user has attested early in the process that they are above the threshold?

[jperson1]

This can be superseded by #4198, as changing and enforcing the dollar threshold (while still allowing pre-2023 audits) are very much tied together.