- Add accumulated_shortfall field to ExtractionStats and MatchReport models
- Add cap_percentage field to ExtractionStats and MatchReport models
- Update API sync endpoint to accept and store accumulated_shortfall and cap_percentage for each match
- Update reports page to show totals at the last match of selected period instead of sync timestamp
- Update client report detail to display accumulated_shortfall and cap_percentage
- Add comprehensive test script for accumulated_shortfall and cap_percentage implementation
- Update templates to display cap_percentage in match lists

This allows tracking the progression of the cap redistribution balance for every client
over time, showing the actual values at the moment of each match extraction.