When a standby steps up, it needs to copy the content from the stable table to the ingest table. If a key has been prepared (either committed or rolled back now) and the prepared timestamp is stable but the durable timestamp or rollback timestamp is not stable, we must have written a prepared update to the stable table. In this case, during the draining process, we need to resolve this prepared update on the stable table. Otherwise, we will have a prepared update never resolved on the stable table.

This ticket aims to implement this logic based on the work done in WT-16743.