curl -X GET https://api.companyflow.com/departments/{id} \
  -H "Authorization: Bearer YOUR_TOKEN"

{
  "success": true,
  "data": {
    "id": "123e4567-e89b-12d3-a456-426614174000",
    "company_id": "987fcdeb-51a2-43f7-9c5d-123456789abc",
    "name": "Engineering",
    "code": "ENG",
    "description": "Software engineering and development",
    "parent_department_id": null,
    "cost_center": "CC-100",
    "status": "active",
    "created_at": "2026-03-03T10:00:00Z",
    "updated_at": "2026-03-03T10:00:00Z"
  }
}