As the title suggests, currently we don't have the total expected values for items processed for each pallet. This stops us from being able to calculate accurate percentages for progress during the migration.
My current thought is once we know the migrationStage is scheduled, we can do some internal processing that calculates roughly what those values are. This way we are not doing processing in the middle of the migration but right before it starts to give us very close to near perfect estimations.