Move reviewer tracking logic inside the non-empty rows guard in both
approved-only and include-unapproved modes. This ensures zero-row
approved sheets don't pollute the reviewer set, fixing the approverName
calculation to only consider reviewers from included ReportDays.
Add test: approved sheet with zero rows and different reviewer correctly
excluded from approver tracking.
All 9 tests passing.
Co-Authored-By: claude-flow <ruv@ruv.net>
redz1029
87014d1656