The persisted bool described user intent (\"the user opted into the
in-place execution mode\"), not a literal consequence -- SlateDB and
event-sourced checkpoints flow regardless of the flag, only git
checkpoints are skipped. Renaming aligns the name with intent and
decouples it from any future implementation that allows git
checkpoints in-place.
The fork validator still consults this bool to bail out with a clear
error before searching for git checkpoints that won't exist.
20e161bc07
