Right now, timeseries.timefield can be a top-level field (typically "timestamp"). Some users would like to be able to set timeseries.timefield to an embedded field. For example instead of

{
  "timestamp": 1680720673000,
  other data
}

They'd like to be able to send

{
  "subdocument": {
    "timestamp": 1680720673000
  },
  other data
}

and be able to set timeseries.timefield to "subdocument.timestamp".