Work about the data organisation

Here is the mission:

1. get the file here attached
2. open it with [draw.io](https://www.draw.io/) (FOSS)
3. read the instructions

The idea is to organise the wallabag data. Please, when doing this activity, do NOT think about the community, just think about the way YOU (want to) use wallabag. And do NOT think in terms of SQL tables, etc, this is not the point, only human beings are my subjects, the rest if perfectly handled by the dev team. Think only about usage.

If you find the exercise difficult or don't get the point about its goal, come to discuss here or on gitter.

Once done, save your file and post it here in comments. If you want to add something (justification, feelings, a more complete description, etc), feel free. I'll try to take all point of view into account.

And thanks to say in the comment if I can contact you for further discussion.

[data model.txt](https://github.com/wallabag/design/files/3331431/data.model.txt)

Download data.model.txt and open it with draw.io, then read the instructions in the file. Produce and attach an updated data-organisation model based on your own use of wallabag, with any rationale or open questions in the issue comments.

Written by the indexing model from the issue text.