Bug: postgresql.UUID used in 5 more model files — breaks SQLite dev/test

[mrveiss]

Problem

PR #2424 (#2402) fixed workflow_permission.py to use dialect-neutral sqlalchemy.types.Uuid, but 5 other model files still import from sqlalchemy.dialects.postgresql import UUID:

• autobot-backend/user_management/models/role.py
• autobot-backend/user_management/models/base.py (also in type_annotation_map)
• autobot-backend/user_management/models/mfa.py
• autobot-backend/models/agent.py
• autobot-backend/models/agent_org.py

Migration files also use it but those are PostgreSQL-specific by nature and don't need changing.

Discovered During

Implementation of #2402 — agent noted the pattern exists in other files.

Suggested Fix

Apply the same fix as #2402: replace sqlalchemy.dialects.postgresql.UUID with sqlalchemy.types.Uuid in all 5 model files. The base.py type_annotation_map also needs updating.

Impact

Medium — Any test touching these models on SQLite will fail with dialect errors.

[mrveiss]

Fixed in PR #2532 (merged). Replaced postgresql.UUID with sqlalchemy.types.Uuid in 5 model files. 6 additional files with mixed JSONB+UUID imports need a separate fix.