InvenTree: Plugin-settings GET endpoints are readable without authentication

InvenTree is an Open Source Inventory Management System. Prior to 1.4.0, PluginSettingList, PluginAllSettingList, and PluginSettingDetail set GlobalSettingsPermissions without the IsAuthenticated permission used by the project default and equivalent global-settings endpoints. GlobalSettingsPermissions returns true for safe methods, while AuthRequiredMiddleware exempts /api/ paths, so an unauthenticated caller can retrieve plugin names, setting keys, descriptions, types, choices, and non-protected configuration values through /api/plugin/settings/ and the per-plugin settings endpoints. Protected secret values remain masked as three asterisks, limiting the issue to metadata and non-secret configuration disclosure. This issue is fixed in version 1.4.0.