Bug: postgresql.UUID remains in 6 more user_management model files

[mrveiss]

6 additional model files still use postgresql.UUID alongside JSONB import. Split needed: keep JSONB from postgresql, move UUID to sqlalchemy.types.Uuid. Files: user.py, audit.py, organization.py, api_key.py, team.py, sso.py. Discovered during #2495.

[mrveiss]

Fixed in PR #2540 (merged). All 6 user_management model files migrated to sqlalchemy.types.Uuid. Note: 9 additional files in autobot-backend/models/ still need migration — separate follow-up needed.