The Results table had a unique constraint on (CvDocumentId, JobDocumentId) but the code
expects uniqueness on (CvDocumentId, JobDocumentId, Language). When matching the same CV
against the same job in different languages, this caused duplicate key violations.
Changes:
- Updated CvMatcherDbContext to define 3-column unique index including Language
- Generated proper EF Core migration to drop 2-column index and create 3-column index
- Updated ModelSnapshot to reflect new 3-column index definition
- Added exception handling in SaveMatchAsync to gracefully handle any race conditions
where duplicate key violations could occur between the existence check and insert
The migration will be automatically applied on container startup via db.Database.Migrate().
Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>
claude
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