Srodif/create deleted at column

[srodif]

Issue link / number:

https://github.com/chaynHQ/bloom-backend/issues/530

What changes did you make?

Added deletedAt column at user table and the database migration.

Why did you make the changes?

Preference of the team for the deletion date data to have a separate column.

Did you run tests?

Yes

Please give any feedback to make this PR more complete, thank you in advance for your time! Requested as reviewers in issue: @eleanorreem @annarhughes