Reverse the stored history diffs #14
Description
Currently we store the history diffs in the direction of v3 -> v2 -> v1. Using this we can only recreate the versions if we have the latest version of the object. When that latest version of the object is deleted from the db it makes the history diffs useless.
To fix this we can reverse the way we store the diffs to "" -> v1 -> v2 -> v3. So we will always be able to recover any version of a record even if we don't have the latest version