- Add title_embedding and content_embedding fields to NewsArticle entity
- Integrate real OpenRouter sentiment analysis in fetch_and_process_article
- Integrate real OpenRouter embedding generation in Dagster workflows
- Add database migration for sentiment_confidence and sentiment_label fields
- Fix Alembic version number format escaping (%%04d)
- Update Dagster metadata to use MetadataValue types for proper display
- Add comprehensive error handling with fallbacks for OpenRouter failures
- Add tests for Dagster OpenRouter integration and sentiment field migrations