[Step 4] Include personal snippets in RootStorageStatistics
At the moment, in the
RootStorageStatistics class, we gather the snippet size from every snippet create in a project belonging to a namespace. Nevertheless, we need to include the personal snippet size when the namespace belongs to a user and not a group.
For that, we need to extend
RootStorageStatistics and, when the namespace belongs to a user, the value inside
snippets_size will be the sum of all project snippets associated to the namespace plus all the personal snippets of the namespace user.