chore: remove unused db stuff

[BlankParticle]

What does this PR do?

Remove accountCredential table and preAccount columns

Remember to run pnpm db:migrate

Type of change

• Bug fix (non-breaking change which fixes an issue)
• Chore (refactoring code, technical debt, workflow improvements)
• Enhancement (small improvements)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

Checklist

Required

• Read Contributing Guide
• Self-reviewed my own code
• Tested my code in a local environment
• Commented on my code in hard-to-understand areas
• Checked for warnings, there are none
• Removed all console.logs
• Merged the latest changes from main onto my branch with git pull origin main
• My changes don't cause any responsiveness issues

Appreciated

• If a UI change was made: Added a screen recording or screenshots to this PR
• Updated the UnInbox Docs if changes were necessary

[BlankParticle]

• fix: show settings based on permissions and spaceShortcode hook cleanup #765
• chore: clean up for unused deps and replacements for deps #764
• chore: remove unused db stuff #763 👈
• main

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[BlankParticle]

Merge activity

• Sep 1, 5:27 AM EDT: Graphite rebased this pull request as part of a merge.
• Sep 1, 5:28 AM EDT: @BlankParticle merged this pull request with Graphite.