docs: require per-task review before read

docs/reference/code-queue-supervision.md

@@ -60,6 +60,8 @@ For broad CI/CD migration waves, use a fixed supervision cadence unless an incid
 
 When a task leaves `running` or `judging`, treat the result as unread work until the final response and judge record have been inspected. Only then should the supervisor decide whether to refill the concurrency window.
 
+Never use a bulk read action to clear unread terminal tasks before inspection. Each completed task must be reviewed on its own first, then marked read individually so the unread state continues to mean “review still needed.”
+
 ## Supervisor Workflow
 
 For each active task, evaluate four things in order: