The two dissolved-walkforward flag tests assert window-independent
properties (plateau acceptance, per-flag stop defaulting) and now use
the ~135-day window the reproduce e2e already uses. The mc roller-fit
test replaces its full-archive probe sweep with a fixed ~30-day window
inside that same span: the property needs a data-carrying window far
shorter than the 90+30-day roller, not a live-span derivation, and the
archive only grows forward. Measured on the data-full host: 19.6s,
19.6s and 14.5s+ of serialized real-data compute drop to 1.1-1.9s each.
refs #250
claude
038e1702b3