🐛 Routes `media-check` blocked on processing

[AntoLC]

Bug Report

We have observed some resources with a infinite loader.

It is because the routes media-check stays sometime blocked on processing.
Ex: https://docs.numerique.gouv.fr/api/v1.0/documents/0f360f98-c7b5-42c7-8306-4ca80491ee93/media-check/?key=0f360f98-c7b5-42c7-8306-4ca80491ee93%2Fattachments%2F2e310f50-1cc1-49aa-8c48-b1f77a68dfdb.png

Possible solution

Add a createtime in the response, if the resource is older than 1h we could switch the loader to fail, by example.