Add baseline evidence (2026-08-09) and executable retirement gates mapped to
GOAL.md. Mark all foundation tasks done and workplan finished; next work is
child implementation streams.
Add architecture/child-workplan-map_v0.1.md linking streams S1–S8 to local
workplans (RMGR, HUB-0004, CORE-0010, STATE-0079, ACTIVITY-0029, OPS-0003,
FIN-0002) with dependencies and project gates.