Implement automated checks for migrations that cause downtime and/or can't be rolled back

[exalate-issue-sync]

Original spike ticket: https://fecgov.atlassian.net/browse/FECFILE-1773

Diagram: https://docs.google.com/drawings/d/1HNd2piLJSSuYqqNbh_yGCTRyQFbEwOU2PSU4yX0QM_I/edit

Demo PR with docs: #1224

Task:

Implement checks for makemigrations locally to flag changes that cause downtime and/or can’t be rolled back. These changes will either need to be fixed or marked as Ignore but the reasons should be documented.

QA Notes

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DEV Notes

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Design

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See full ticket and images here: FECFILE-1866