abab1f1684
Spec auto-signed on a grounding-check PASS: the risk regime becomes a structural campaign axis (a peer of instruments/windows, kept-separate in the executor, each member's resolved stop stamped into its manifest; regimes are compared, never argmax-selected across — a cross-regime E[R] argmax would mix R units, C10). The 5-task plan threads it through aura-research (RiskRegime + CampaignDoc.risk), aura-campaign + aura-registry (matrix expansion + regime_ordinal), and aura-cli (StopArm + wrap_r + the manifest stamp). Two bounded, documented descopes: the descriptive CAMPAIGN_SECTIONS introspection entry and multi-regime trace-dir isolation. refs #210