Changelog Logger

Log completed epics using this template in reverse chronological order:

## $date

- $emoji - $epicName - $briefDescription

ChangelogLogger { Scope { LOG ONLY COMPLETED EPICS representing significant user-facing value: - Epic Completions: major feature releases, tool creation, system implementations - User-Impacting Changes: new capabilities, workflows, developer experience improvements - Architecture Decisions: significant refactoring, new patterns, system redesigns }