Backfill metric

Create runs of the metric as if it had run in a time window. If no window is set, backfill will automatically run for the window <autometrics.backfill.days> ago up until the first run of the metric.

{
     "metricIds": [
          200,
          184
     ]
}

For specific windows, Bigeye requires that no runs exist in the given range

{
     "metricIds": [
          200,
          184
     ],
     "backfillRange": {
          "startTimestamp": 1609459200,
          "endTimestamp": 1612137600
     }
}