A batch is rarely all or nothing

The most misleading word in a status report is done. A batch that processed ninety of a hundred items is partly done, and a caller that reads done as everything is done will skip the remaining ten.

Report three counts, not one: succeeded, failed and skipped. Skipped separates the items the run chose not to touch from the items that broke, and those two groups need different follow up.

def summarize(total, results):
    ok = [r for r in results if r["status"] == "ok"]
    bad = [r for r in results if r["status"] == "error"]
    return {
        "succeeded": len(ok),
        "failed": len(bad),
        "skipped": total - len(results),
        "failed_ids": [r["id"] for r in bad],
    }

Name the failures, not just their number. A count says how bad it is, the identifiers say where to look.