Previously zmaudit logged "Finished resyncing Event_Summaries" /
"Finished updating Storage DiskSpace" unconditionally as long as the
aggregate SELECTs succeeded, masking per-row UPDATE failures (e.g.
zmDbDo exhausting its deadlock retries) and skipped aggregate column
groups. Track which aggregates were skipped and which per-monitor /
per-storage UPDATEs failed (zmDbDo returns undef on failure), and
surface that in the audit log instead of claiming the resync is
complete.
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