{
  "provenance": "Original synthetic fixture. No real model was run. Results apply only to these four invented records.",
  "metric": "Exact match of order_id after trimming leading/trailing whitespace; missing order_id fails the schema check.",
  "rows": [
    {"id":"A","expected":"DEMO-01","output":{"order_id":"DEMO-01"}},
    {"id":"B","expected":"DEMO-02","output":{"order_id":"DEMO-20"}},
    {"id":"C","expected":"DEMO-03","output":{}},
    {"id":"D","expected":"DEMO-04","output":{"order_id":" DEMO-04 "}}
  ]
}