Move line-walk/delta/phase2/frontend audits and legacy memory into
docs/archive/, add functional development SSOT, thin AGENTS/CLAUDE stubs,
and regenerate changelog/audit indexes via consolidate_docs.py.
Apply sync/install/auth/schedule/retry/agent/settings fixes from full
code review; document accepted WS and Agent legacy risks for solo ops.
Co-authored-by: Cursor <cursoragent@cursor.com>