List Harnesses

List all standard harnesses (global resources).

Standard harnesses are global and not scoped to a team. They are read-only and managed externally.

Args: team_id: Team ID (required for permission checks) claims: JWT claims with user and team info harness_service: Harness service instance

Returns: List of harness items, ordered by updated_at descending

Raises: HTTPException: 422 if team_id is missing, 403 if user lacks permission, 500 on server errors