Joseph Doherty
a2565604df
PipePair runs both ends of a duplex pipe in one process with blocking FlushFileBuffers under every frame write, so it wedges after roughly 85 large round trips. Drain the full 10,000 byte-heavy events to empty at the queue layer, where the no-loss property actually lives, and keep the pipe walk at 1,000 events (29 replies) so it still proves the split end to end. Also give the truncation test's budget slack: item handle 0 is a proto3 default and is not serialized, so the probe measurement is a lower bound on the fixture's per-event cost.