Test flow year combination filling #5
Description
Add test coverage for flow year combination filling magic transformation.
Verify that missing combinations of flow and year_data are passed to flow_milestone and flow_commission rows.
Reference: README magic transformations - 'Missing combinations of flow and year_data are passed to flow_milestone and flow_commission rows'
🤖 Generated with Claude Code
Co-authored-by: Claude Code (claude-sonnet-4-20250514) noreply@anthropic.com