Time of units start training

Which file in the archive can we find when a unit start training? (not the time finish training)

I found something in file 'replay.tracker.events' which is close to the aim I think, they're about:

- a unit finished training (event 'NNet.Replay.Tracker.SUnitBornEvent')
- a structure start constructing (event 'NNet.Replay.Tracker.SUnitInitEvent')

but none of them are suitable.

Start by inspecting replay.tracker.events and the listed SUnitBornEvent and SUnitInitEvent records. Compare the archive data around unit training to determine whether a distinct training-start event or another file is represented. Done means identifying the relevant archive location and event, or documenting that the protocol does not expose it.

Written by the indexing model from the issue text.