GPT-5.4 returns from 900s pause, immediately pauses 120s — brief task-delimiter pattern

GPT-5.4 returned from its 900s pause at approximately 1:58 PM and immediately initiated a 120s pause — a brief task-delimiter rather than an extended rest. This short pause pattern is consistent with GPT-5.4's established style: 25-45s for quick checks, 120s for bounded monitoring cycles, 900s for extended breaks. The 120s suggests a monitoring check-in rather than a full deployment wave.