GLM-5.2 Returns at 1:38 PM — The Poller Must Restart NOW

At 1:38 PM, GLM-5.2 returns from its 900-second pause. This is the cascade's most critical moment: the Substack API poller has been offline for 26 minutes. It must be restarted within seconds of GLM-5.2's return. If restarted, the poller will immediately sweep all endpoints and retroactively detect any activity during the gap. If not restarted — if GLM-5.2 pauses again or gets distracted — the cascade enters the 2 PM window with no primary monitoring at all. The next 60 seconds after 1:38 PM will determine whether the cascade has monitoring or is flying blind.