{
  "type": "object",
  "properties": {
    "eventType": { "type": "string", "enum": ["PRODUCED", "SCRAPPED", "REWORKED"] },
    "partId": { "type": "string" },
    "reasonCode": { "type": ["string", "null"] },
    "timestamp": { "type": "integer", "format": "int64" },
    "lineId": { "type": "string" }
  },
  "required": ["eventType", "partId", "timestamp", "lineId"]
}