Some Engine tasks have checks to make sure that the EngineSyncState they are working with is valid. Example:

This feels like a code smell because why would we allow invalid EngineSyncStates to get created only to cause problems downstream?

This task is to add error handling to the apply_update function as well as any other instantiations of EngineSyncState to

1. Guarantee all cases of invalid EngineSyncState are caught
2. Cause an error right when the problem occurs, instead of somewhere downstream
3. Create and perform validation logic in a single place rather than its various uses