feat(confidence-engine): isolate finding-informed understanding

lib/graph/orchestrator.js

@@ -30,7 +30,7 @@ import {
   selectActiveUnknownCandidate,
   validateGraphReferences,
 } from "./utils.js";
-import { validateFindings } from "./finding-helpers.js";
+import { validateFindings, produceFindingInformedSummary } from "./finding-helpers.js";
 
 function toValidationErrors(error) {
   return (
@@ -853,6 +853,14 @@ async function updateCaseWithDependencies(body, dependencies = {}) {
       appendedFindings = normalized;
     }
 
+    // ── Post-authoritative finding-informed understanding seam ────
+    const authoritativeSummary =
+      applicationResult.updatedSituationGraph?.currentSummary ?? "";
+    const experimentalSummary = produceFindingInformedSummary(
+      authoritativeSummary,
+      appendedFindings,
+    );
+
     return {
       success: true,
       stage: "update_applied",
@@ -866,7 +874,7 @@ async function updateCaseWithDependencies(body, dependencies = {}) {
       newActiveUnknownNodeId: applicationResult.newActiveUnknownNodeId,
       changesApplied: applicationResult.changesApplied,
       appendedFindings,
-      summary: applicationResult.updatedSituationGraph?.currentSummary ?? "",
+      summary: experimentalSummary,
       diagnostics: buildUpdateDiagnostics({
         promptVersion,
         modelName,