The worker marked a turn failed on any error reading its log. A missing log,
a damaged line or a turn not found still fail it; any other I/O error is now
waited out with the outage's doubling wait, logged once when it starts and
once when the log reads again (pointer session-log-damaged, whose runbook
entry now covers it), shown by bxctl memory sync, and the turn stays waiting.
read_records tells an unreadable file from a damaged line (read_log is
unchanged). The message helpers move from worker.rs to honcho/messages.rs,
re-exported, to keep worker.rs under 500 lines.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
