Internal document identifier are case sensitive

[richard-julien]

Description

Internal document identifier are case sensitive

This situation leads to GraphQLError: Id loading expect only one response

We need to:

• Lower case the id
• Create a migration to remove the duplicate

[JeremyCloarec]

When working on this, I realized that MinIO is also case sensitive: Should we still fix this by making the id case insensitive? Isn't there a risk that we will lose access to some files on minio that have the same name but with different cases ?

[richard-julien]

Yes, I still want to handle file name as case insensitive.