{
  "synthetic": true,
  "rows": [
    {
      "employee_id": "DEMO-001",
      "overtime_hours": 16,
      "leave_hours": 16,
      "leave_days": 2,
      "source": "monthly_summary"
    },
    {
      "employee_id": "DEMO-002",
      "overtime_hours": 0,
      "leave_hours": 0,
      "leave_days": 0,
      "source": "monthly_summary"
    },
    {
      "employee_id": "DEMO-003",
      "overtime_hours": null,
      "leave_hours": null,
      "leave_days": null,
      "source": "missing"
    }
  ]
}