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Three measurement fixes landed with no doc or dashboard change, leaving text that is now false and one fix unusable from a dashboard. Deferrals and timeouts are recorded in TimeoutCounter, a base shared by five subclasses, so the all-lane pair could show the documented livelock fingerprint while ledger acquisition was healthy. The runbook procedure and the reference doc now name acquire_ledger_deferrals and acquire_ledger_timeouts and say why the all-lane pair misleads; a new panel plots the ledger-scoped pair as rates on one axis, since the divergence is the signal. The existing panel is retitled All Lanes and points at it. Writer mean depth is depthSum over depthSamples, not over insertCount, and the measured 1.60 came from the biased estimator, so it and the 37% queueing share derived from it are lower bounds rather than values. The reference table now marks them as such, and the decision rule is shown to survive the correction rather than depending on the exact figures. Completions were never counted for acquisitions satisfied from the local store, so the run that read zero across 510 seconds had in fact reached full. Every place that treated a zero as a symptom now says it only means something on a build that has the fix. Also corrects the sync-diagnosis label-value count from 13 to 15 and a stale source line range; the instrument count stays 35, because both new values multiplex onto the existing nodestore_state gauge. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>