- Add language parameter to import endpoints and background tasks
- Extract translation fields (title, description, short_description)
- Create/update MarketplaceProductTranslation records during import
- Add MarketplaceProductTranslationSchema for API responses
- Map product_type column to product_type_raw to avoid enum conflict
- Parse prices to numeric format (price_numeric, sale_price_numeric)
- Update marketplace product service for translation-based lookups
- Update CSV export to retrieve titles from translations
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Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>