## Context
In some CustomException exceptions, we were instantiating a code without
initializing it which was overriding the parent code and it was then
lost when retrieving it in filters.
Removing them to make sure we don't reproduce this pattern
Class exception for each metadata module + handler to map on graphql
error
TODO left :
- find a way to call handler on auto-resolvers nestjs query (probably
interceptors)
- discuss what should be done for pre-hooks errors
- discuss what should be done for Unauthorized exception
