Bounded memory and efficient closing of old data files on long runs, a failure ending the run in
an error state the broker hears about, and the pusher's log line when a stalled writer makes it
drop images; the master-file ordering moves here from the Fixes line. Owner-requested edit.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01EizBKhTqrAYago9KJG3dA3