Test asset year combination filling #4
Description
Add test coverage for asset year combination filling magic transformation.
Verify that missing combinations of asset and year_data are passed to asset_milestone and asset_commission rows.
Reference: README magic transformations - 'Missing combinations of asset and year_data are passed to asset_milestone and asset_commission rows'
🤖 Generated with Claude Code
Co-authored-by: Claude Code (claude-sonnet-4-20250514) noreply@anthropic.com