استرجاع الدفعة (Retrieve Batch)

curl -X GET "https://api.tokenlab.sh/v1/batches/batch_abc123" \
  -H "Authorization: Bearer sk-your-api-key"

{
  "id": "batch_abc123",
  "object": "batch",
  "status": "completed",
  "input_file_id": "file_abc123",
  "output_file_id": "file_out123",
  "error_file_id": "file_err123",
  "request_counts": { "total": 100, "completed": 98, "failed": 2 }
}