Document the three-layer model, add railiance-rhythm executor install, and
point playbooks at rein-aharness fi-research-brief instead of local crontab.
Add 2026-08-03 week catch-up brief with Kimi K3 as S1 strategic (collection
deferred on ~1454 GiB vs 850 GiB soft quota), document recurrence ops, and add a
workstation due-notice consumer cron helper. Production schedule was applied to
railiance ConfigMap and Temporal (weekdays 07:30 Europe/Berlin).
