Exchange unit tests result in warnings due to long lines

[schrolla]

🐛 Summary

The refactored Exchange Rego unit tests contain lines beyond the style limit resulting in warnings from Regal when running linting in workflows. These warnings are shown as annotations/notes on workflow results from the OPA Unit Tests workflow.

To reproduce

Steps to reproduce the behavior:

1. Run the OPA Unit tests workflow on a recent branch or main
2. Then review the results and look for warnings

Expected behavior

For the unit tests to run and not produce any warnings.

Any helpful log output or screenshots

See this action result as an example of the offending warnings.
https://github.com/cisagov/ScubaGear/actions/runs/10908058113

Also, here is a screenshot showing the offending warnings.