Audit batch: prefetch storm, day-bucketing unification, warm-path efficiency#711
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…rm-path collapse - prefetch fires exactly once per provider per session; memo sized to detected providers so base keys never evict (was: 12 full-history parses every 30s forever from LRU thrash re-triggering the effect) - day-aggregator buckets whole turns by user-message timestamp, matching the report/headline path: trend bars and provider breakdown now reconcile exactly (midnight-straddling turns were split); DAILY_CACHE_VERSION 13 with an IANA tz guard that rehydrates when the cache crosses timezones - overview's redundant second all-provider scan collapsed (~11% faster warm); numbers parity-guarded - lock takeover cleans stale hydrating.lock; SIGINT/SIGTERM release it - scanner skips EPERM/EACCES provider dirs (progress shows skipped) instead of aborting; onboarding hints Full Disk Access - rateLimited quota copy render tests; export -f json emits valid empty JSON when no data Root 2023 (+4), app 327 (+3), typechecks clean.
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Fixes everything from the three-agent verification campaign: the critical perpetual prefetch storm (12 parses/30s), the V1 day-bucketing split (charts now sum exactly to headlines), an 11% warm overview win, TZ cache guard, lock hygiene, EPERM resilience, FDA onboarding hint, and the low-severity items. Fail-on-old-code tests throughout. Root 2023, app 327.