The constant ExtractionConstants.PLUGIN_EXTRACTION does not really refer to the plugin name but to th i18n catalog name. This constant should be renamed and a new constant should be created for the plugin name.

Use the PLUGIN_NAME constant in the CATALOG_NAME one.

Use the PLUGIN_NAME_CONSTANT in the ExecuteExtractionSchedulable to build the result file download url (ExecuteExtractionSchedulable#_getResultFileDownloadLink)

Before doing all this, check that the existing constant is only used for i18n catalog purposes