curl -X PATCH "https://api.hitler.app/api/users/user-uuid-123" \
  -H "Authorization: Bearer YOUR_TOKEN" \
  -H "Content-Type: application/json" \
  -d '{
    "role": "manager"
  }'

{
  "id": "user-uuid-123",
  "email": "john@acme.com",
  "name": "John Doe",
  "role": "manager",
  "isActive": true,
  "organizationId": "org-uuid",
  "createdAt": "2024-01-10T15:30:00.000Z",
  "updatedAt": "2024-01-15T14:00:00.000Z"
}