84372: Add column failure_notification_sent_at to AppealSubmission and AppealSubmissionUpload

[dfong-adh]

Summary

Migration to add failure_notification_sent_at to AppealSubmission and AppealSubmissionUpload

Related issue(s)

department-of-veterans-affairs/va.gov-team/issues/84372

Testing done

Migration verified locally

What areas of the site does it impact?

• This impacts the AppealSubmission and AppealSubmissionUpload tables as it adds a new column (nullable column)

Acceptance criteria

• I fixed|updated|added unit tests and integration tests for each feature (if applicable).
• No error nor warning in the console.
• Events are being sent to the appropriate logging solution
• Documentation has been updated (link to documentation)
• No sensitive information (i.e. PII/credentials/internal URLs/etc.) is captured in logging, hardcoded, or specs
• Feature/bug has a monitor built into Datadog (if applicable)
• If app impacted requires authentication, did you login to a local build and verify all authenticated routes work as expected
• I added a screenshot of the developed feature

Requested Feedback

(OPTIONAL)What should the reviewers know in addition to the above. Is there anything specific you wish the reviewer to assist with. Do you have any concerns with this PR, why?

[shaunburdick]

LGTM