Reports the local time on the SSG box when the minimum authorization rate in cssgTalMinAuthRate was recorded. Like its max counterpart, this timestamp makes the recorded minimum useful for correlation — for instance confirming the lull happened during expected overnight low-traffic hours rather than during business hours, which would instead suggest an authorization pipeline stall. If cssgTalMinAuthRateTimestamp shows a time in the small hours of the morning, that lines up with expected overnight low traffic and confirms the recorded minimum isn't evidence of a daytime outage.