Archive v1.1 artifacts (roadmap, requirements, phases) to milestones/.
Evolve PROJECT.md with shipped requirements and new key decisions.
Reorganize ROADMAP.md with collapsed milestone groupings.
Update retrospective with v1.1 lessons.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Archive roadmap, requirements, and phase directories to milestones/.
Evolve PROJECT.md with validated requirements and key decisions.
Reorganize ROADMAP.md with milestone grouping.
Delete REQUIREMENTS.md (fresh for next milestone).
