scanProjectDirs ran every cached turn through cachedTurnToClassified —
per-call reconstruction plus the turn classifier's category / retries /
edit regexes — and only then applied the date slice, so a week view paid
to classify all of history to keep a few percent of it.
The keep/drop decision now runs on the raw CachedTurn (calls map 1:1 onto
assistantCalls, so callsInRange sees the same survivors as the classified
slicer) and only survivors are classified, still from their complete call
list. The branch and PR-set carries still walk the full ordered turn list,
and buildSpawnPrSets still reads the pre-slice turns.
Real corpus, warm one-shot status --format menubar-json --no-optimize,
identical payloads: today 1561ms -> 1318ms, week 1560ms -> 1410ms,
month 1788ms -> 1675ms.
