The ensemble gate (EnsembleClassifier::determine_triage) and the survivor
record (Survivor::new -> TriageCalculator::calculate) used two different
START-protocol approximations with different rate bands and movement handling.
The pipeline gated on the ensemble triage then discarded it and recomputed via
TriageCalculator, so a survivor could be admitted as one priority and recorded
as another (e.g. 28 bpm + Tremor: gate said Delayed, record said Immediate).
In a mass-casualty tool that divergence is a life-safety defect.
determine_triage now delegates to TriageCalculator (the single source of truth),
retaining only the ensemble confidence gate (low confidence -> Unknown, except
Immediate which is never suppressed). Updated unit + integration tests to the
canonical expectations and added a divergent-boundary regression asserting
gate triage == survivor-record triage.
Co-Authored-By: claude-flow <ruv@ruv.net>
78821f1657