{
  "input_records": 8,
  "accepted_records": 4,
  "rejected_records": 4,
  "normalized_fields": 4,
  "rules": {
    "required_fields": [
      "customer_id",
      "name",
      "email"
    ],
    "whitespace": "Trim leading and trailing whitespace in every field",
    "email": "Lowercase and check basic format; no deliverability check",
    "duplicates": "Keep first valid row per trimmed, case-sensitive customer_id",
    "source_record": "One-based CSV data record, excluding header; not physical line"
  }
}