feat(confidence-engine): add focused finding handoff plumbing

lib/graph/orchestrator.js

@@ -30,6 +30,7 @@ import {
   selectActiveUnknownCandidate,
   validateGraphReferences,
 } from "./utils.js";
+import { validateFindings } from "./finding-helpers.js";
 
 function toValidationErrors(error) {
   return (
@@ -596,7 +597,7 @@ async function updateCaseWithDependencies(body, dependencies = {}) {
     };
   }
 
-  const { situationGraph, previousQuestion, answer, promptVersion } =
+  const { situationGraph, previousQuestion, answer, promptVersion, findings: incomingFindings } =
     parsedRequest.data;
 
   const graphSchemaValidation = situationGraphSchema.safeParse(situationGraph);
@@ -825,6 +826,33 @@ async function updateCaseWithDependencies(body, dependencies = {}) {
       };
     }
 
+    // ── v2: process incoming findings (no graph mutation) ────
+    let appendedFindings = [];
+
+    if (incomingFindings && Array.isArray(incomingFindings) && incomingFindings.length > 0) {
+      const validated = validateFindings(incomingFindings);
+
+      // Filter out rejected findings for display only — do NOT modify currentSummary.
+      // Direct concatenation of Finding text into Current Understanding would bypass
+      // the authoritative case/update reasoning that evaluates Finding context.
+      // Per v1 handoff contract: "Noted as not directly relevant" and similar markers
+      // are display-only; they must never be appended to summary or graph state.
+      const validForDisplay = validated.findings.filter((f) => f.evaluation !== "rejected");
+
+      // Normalize and include approved findings in the response (display passthrough)
+      const normalized = validForDisplay.map((f) => ({
+        id: f.id,
+        proposition: f.proposition,
+        status: f.status,
+        userDisposition: f.userDisposition,
+        originatingTargetNodeId: f.originatingTargetNodeId,
+        contributionId: f.contributionId,
+        sourceObservation: f.sourceObservation,
+        createdAt: f.createdAt,
+      }));
+      appendedFindings = normalized;
+    }
+
     return {
       success: true,
       stage: "update_applied",
@@ -837,6 +865,8 @@ async function updateCaseWithDependencies(body, dependencies = {}) {
         applicationResult.previousActiveUnknownNodeId,
       newActiveUnknownNodeId: applicationResult.newActiveUnknownNodeId,
       changesApplied: applicationResult.changesApplied,
+      appendedFindings,
+      summary: applicationResult.updatedSituationGraph?.currentSummary ?? "",
       diagnostics: buildUpdateDiagnostics({
         promptVersion,
         modelName,