[Main task] DB schemas of current projects

First of all, we'll start from understanding the current state of database schemas that we have in my projects.
The easiest way to do it - check how i build it before(it's not ideal, but it works). And recreate a visual scheme.

Later we'll spend some time and read some best-ideas about good recipe database structures. because a lot of things was created before us.

Then we'll need to have a list of current projects -> next releases -> features that require a db updates.
this is @atherdon task.