{
  "unit": "src-host window and calendar day",
  "development": "2026-03-01/2026-03-04 inclusive",
  "test": "2026-03-05/2026-03-07 inclusive",
  "sites": [
    "dc-east",
    "dc-west"
  ],
  "leakage_controls": [
    "No random row split inside one labeled event",
    "Hour of day and IP/host identity are not model features",
    "Train and test review events use different source hosts and rare destinations",
    "Scaler and Isolation Forest / autoencoder fit only on development non-review windows"
  ]
}