Implement AccomplishmentReportData and buildAccomplishmentReportData() for
generating programmer accomplishment reports. Supports both approved-only and
include-unapproved modes, with proper row filtering, day aggregation, metrics
calculation (totalSeconds, tasksCompleted, helpSeconds, secondsByCategory),
and approver tracking.
All 8 tests passing.
Co-Authored-By: claude-flow <ruv@ruv.net>
