[Bug] Backend startup fails with NameError: name 'uuid' is not defined in auth.py

[Congregalis]

Pre-checks

• I have searched existing issues and this is not a duplicate.

Deployment Method

Source (setup.sh)

Steps to Reproduce

Run sh restart.sh from project root.

Expected vs Actual Behavior

Backend crashes during import with:
NameError: name 'uuid' is not defined

Logs / Screenshots

Regression introduced by commit 6041197 ("Merge branch 'main' into Atlas-SZ/main"), where uuid type annotations remained but the import was dropped.

[yaojin3616]

This issue is being addressed in PR #225 (Phase 2: User Identity & Multi-Tenant Org Refactor Finalization).

The uuid import was dropped during the merge of main into Atlas-SZ/main. The fix has been included in the refactor branch.