chore: add migration script to add StatusCreatedAt property to Vault NAME# items

[craigzour]

Summary | Résumé

Part 4 of https://github.com/cds-snc/platform-forms-client/issues/4287

• Adds or updates Status#CreatedAt property (using the existing Status and CreatedAt properties from the same item) in NAME# items.

[github-actions[bot]]

:test_tube: Review environment

https://hfe6nvunoswtaodjd67f6vhspa0ourez.lambda-url.ca-central-1.on.aws/