- Add test-specific Drizzle config and database connection
- Create test version of auth module using test database
- Add comprehensive integration tests for signin migration logic
- Add unit tests for deduplication algorithm
- Tests cover edge cases like multiple duplicates, timing, and error handling
🤖 Generated with [Claude Code](https://claude.ai/code)
Co-Authored-By: Claude <noreply@anthropic.com>
