Bug: Language selector worked on UI but import always used 'en'
Root causes:
1. Frontend: startImport() was not including language in API payload
2. Backend: language was not stored in import job database record
3. Backend: language was not returned in API response models
Fixes:
- Add language to payload in marketplace.js startImport()
- Add language column to MarketplaceImportJob model
- Store language when creating import job in service
- Include language in both response model converters
- Add database migration for language column
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Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
Samir Boulahtit
8e5da6fec3