RMCMA v0.19 Experiment Registry + Sequential/Canary Lab
========================================================
Status: PASS
Semantic digest: 6e73ac75f89039cdccc707424e91f03651afced6eef3710bd5ef24ecb476093a
Sequential efficacy look: 1 / EARLY_EFFICACY
Alpha spent / total: 0.01250 / 0.05000
Futility look: 2 / EARLY_FUTILITY (non-binding)
Canary stages: 5% -> 25% -> 50% -> 100%
Global promotion revision: 7
Guardrail canary decision: ROLLBACK_GUARDRAIL

Checks:
  PASS seed_v017_passes
  PASS sequential_efficacy_stops_early
  PASS alpha_spending_is_bounded
  PASS sequential_uses_predeclared_randomized_receipts
  PASS futility_is_nonbinding_and_stops_early
  PASS lineage_is_dag_chain
  PASS canary_has_all_four_stages
  PASS canary_stages_all_pass
  PASS global_promotion_only_after_final_canary
  PASS promotion_revision_created
  PASS guardrail_rolls_back_canary_before_global_promotion
