fix(rectification): keep spoken collect from silencing the agent

Collect focus was leaking discriminator probes into the agent prompt and
inheriting choice identity. Mark spoken questions, hide current_probe
unless a real choice card exists, strip fallback identity, log persist
failures, and align the decision probe with the plan including birthDate.

Co-authored-by: Cursor <cursoragent@cursor.com>

frontend/src/app/api/rectification/agent/route.ts

@@ -386,19 +386,19 @@ export async function POST(request: Request) {
           return completedMessageResponse(applied.narration, requestId, caseId);
         }
       } else {
-        const decision = decideFromDossier(dossier);
+        let birthDate: string | null = null;
+        try {
+          const compute = await loadV9CaseCompute(accounting, userId, caseId);
+          birthDate = String(compute.baselineBirthSnapshot.birth_date ?? "") || null;
+        } catch {
+          // Ranking stays fail-open when compute is unavailable.
+        }
+        const decision = decideFromDossier(dossier, { birthDate });
         if (decision.nextAction === "ask_candidate_discriminator") {
           const catalog = rectificationFollowupCatalog(
             dossier.latestResult,
             dossier.evidence,
           );
-          let birthDate: string | null = null;
-          try {
-            const compute = await loadV9CaseCompute(accounting, userId, caseId);
-            birthDate = String(compute.baselineBirthSnapshot.birth_date ?? "") || null;
-          } catch {
-            // Ranking stays fail-open when compute is unavailable.
-          }
           const plan = buildMethodFollowupPlan({
             evidence: dossier.evidence,
             declinedTopics: dossier.conversationSummary.declinedSkippedTopics,
@@ -588,8 +588,16 @@ export async function POST(request: Request) {
             let decision;
             try {
               const dossier = await loadV9CaseDossier(accounting as never, userId, caseId);
+              let birthDate: string | null = null;
+              try {
+                const compute = await loadV9CaseCompute(accounting as never, userId, caseId);
+                birthDate = String(compute.baselineBirthSnapshot.birth_date ?? "") || null;
+              } catch {
+                // Ranking stays fail-open when compute is unavailable.
+              }
               decision = decideFromDossier(dossier, {
                 currentEvidenceFingerprint: evidenceLedgerFingerprint(dossier.evidence),
+                birthDate,
               });
             } catch {
               decision = undefined;