An event touching a directory mid-build is buffered — its store write
waits for build completion — while its invalidation runs immediately.
That refresh resolves against the store, which can still hold the older
listing snapshot, pinning the handle to pre-event state with no later
refresh. Replay buffered events with entry invalidation enabled: by
then the store is ordered, so the re-invalidation lands the final
state. Events the snapshot filter skips need no re-invalidation since
the listing state is at least as new.
Also correct the resolution comment: the store misses for TTL-expired
entries too, and on a read-through miss the event-entry fallback can
still roll back a racing local flush, since neither write reaches the
store there.
Chris Lu
edacb39b81