bug: change the default source when type is NamedEntity

[ClemDoum]

Current behavior

For the export-by-query command, when --type NamedEntity the source is still default to the document default source, which leads to a CSV with mostly empty columns since documents fields are not found in named entities

Expected behavior

When using export-by-query command with --type NamedEntity, fields like mention,mentionNorm,language,category should be exported by default, or at least the CSV shouldn't be half empty