Store references to exported images
It would be great to store references (ids or urls) of exported images (maybe except for local file exports),
so that you can easily re-export/update images after you change them.
There could probably be a separate table for that, referencing an image, chosen export parameters, name of the export service and reference to the image.
Further functionality that e.g. offers to update remote copy can be developed later.
Exporting plugins for Lightroom do that and it is really useful.
What do you think?