It is 2 a.m. The on-call engineer's phone buzzes. They glance at it, recognize the same alert they have seen forty times this week, and swipe it away. Every single time before this, it turned out to be nothing. This time, it was not nothing. That is alert fatigue, and it is the single most common way IoT alerting systems fail. Not because the sensors stopped working. Not because the platform went down. Because the team stopped believing the alerts were worth acting on. The fix is not...