Completes a list of orders in batches of 100.
Validation runs first (construct + auth) with no commit; any validation fault leaves all orders unchanged.
A later save or Finish failure (for example a package insert that cannot apply) may leave earlier
batches completed. Retry the original list; already-completed orders are skipped. If retry
validation fails, drop on-hold or shipped IDs. If retry still fails on commit, drop that ID
and resubmit the remaining open orders.
Success status: 204

{
  "orderIdentifiers": [
    {
      "id": 1
    }
  ]
}