• 🔧 Import: support importing movies with only IMDB IDs.
• 🔧 Import: support new "imdb-movie" list item type, maps to added movie using "externalId" as IMDB ID on import, otherwise skips.
• 🔧 Import: display a simple summary of imported and skipped items.
• 🔧 Import: restore original data on failure.
• 🔨 Export: resolve "Illegal seek" error for the DAVx5 WebDAV-backed storage provider and likely others. Thanks @mvanhorn for the tip!