Bug: postgresql.UUID remains in 9 autobot-backend/models/ files alongside JSONB

[mrveiss]

Problem

PRs #2532 and #2551 replaced postgresql.UUID with sqlalchemy.types.Uuid in 11 model files. However, 9 more files in autobot-backend/models/ still import UUID from sqlalchemy.dialects.postgresql alongside JSONB:

• autobot-backend/models/process_run.py
• autobot-backend/models/workflow_audit.py
• autobot-backend/models/session_collaboration.py
• autobot-backend/models/activities.py
• autobot-backend/models/heartbeat.py
• autobot-backend/models/task_delegation.py
• autobot-backend/models/config_revision.py
• autobot-backend/models/approval.py
• autobot-backend/models/secret.py

These files need the same import-splitting treatment as #2533: keep JSONB from postgresql, move UUID to sqlalchemy.types.Uuid.

Discovered During

Code review of PR #2551 (#2533)

Fix

Apply the same pattern: split from sqlalchemy.dialects.postgresql import JSONB, UUID into two imports, replacing UUID with from sqlalchemy.types import Uuid.

Impact

Breaks SQLite dev/test environments. Medium priority — same as #2495 and #2533.

[github-actions]

PR #2571 (merged to Dev_new_gui) references this issue with a close keyword.

fix(models): replace postgresql.UUID with Uuid in 9 more model files (#2563)

If this issue is fully resolved, close it manually. If work remains, no action is needed.

[mrveiss]

Merged.