curl --request PATCH \
  --url https://api.olostep.com/v1/batches/{batch_id} \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "metadata": {
    "status": "reviewed",
    "reviewer": "jane@example.com"
  }
}
'

{
  "id": "batch_abc123def456",
  "object": "batch",
  "status": "completed",
  "created": 1704067200,
  "total_urls": 10,
  "completed_urls": 10,
  "metadata": {
    "batch_name": "Q1 Product Sync",
    "status": "reviewed",
    "reviewer": "jane@example.com"
  }
}