Record POD history and allow restoration to historical state

[jeswr]

Pitch

Allow the user to go "whoops - I didn't mean to do that" and revert to a previous state.

Desired solution

Rather than update queries just overriding data; there should be a well maintained history of the data; and metadata around how made the changes and when.

Acceptance criteria

There are two things that I would want for this to be considered working successfully

• For apps to be able to access the versioning history of their changes; so that undo/redo behavior can easily be implemented within applications. A fairly easy top of mind example would be a "TODO" app which allows users to restore tasks they have deleted.
• An app that gives users and administrators a view of all data changes/access and the capability to revert/restore data to particular points in history.

Pointers

• https://rdfostrich.github.io/article-jws2018-ostrich/#dictionary

Scenarios

[RubenVerborgh]

Sounds good; needs to be applied to a concrete use case, but I think that's straightforward in this case.