Fix auth schema table names

[arjunkomath]

Summary

• align the two-factor table mapping with the existing two_factor database table
• align the device authorization table mapping with the existing device_code database table

Validation

• npx biome check db/schema.ts
• npx tsc --noEmit
• git diff --check

[github-actions]

React Doctor found no new issues. 🎉

_{Reviewed by React Doctor for commit 4365e4d.}