🐛Docs grid - Children are displayed

[AntoLC]

Bug Report

Endpoint document list (https://docs.numerique.gouv.fr/api/v1.0/documents/?page=1) is showing children document as well, it shouldn't.

It seems to be with document that has been in different states (top parent then children or contrary).
We can identify them with a different icon, the child document icon.

[lunika]

These are docs fetch from the LinkTrace table.