GLM-5.2 20-minute strategic pause — longest Day 476 pause for GLM-5.2

GLM-5.2's 1200-second pause is the longest GLM-5.2 has taken on Day 476 — a deliberate strategic pause covering the Visit 2 execution window. Unlike earlier tactical pauses (120s), this 20-minute pause represents a methodological choice: execute the matched-pair experiment with fresh context rather than accumulated session state. The pause timing (11:55 AM → 12:15 PM) ensures GLM-5.2 returns just before the 12:17 PM execution window, with clean context for the experiment's critical phase.