createWriteStream.write() returns false once its internal buffer is full;
both reassembly loops ignored that and kept queueing chunks, so the queue
grew in memory instead of flushing to disk. Measured over a 1.5 GiB
reassembly in 10 MB chunks, this buffered 170 MB versus 10 MB when the
drain event is awaited.
Also fail loudly on a missing chunk in the v1 loop, matching v2, rather
than silently writing a corrupt file.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
twotalesanimation
2d0c33a45b