fix(rectification): ask from the scored probe catalog, not snapshot leftovers

Empty snapshot candidates were starving remaining D24 splits, so the
TypeScript follow-up chain asked the low-gain Python career probe.
Read paths now share one inference+engine catalog and yield a stale
low-gain distinguish card to the current winner.

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

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

@@ -21,16 +21,15 @@ import { resolveSessionLanguageModel } from "@/lib/model-catalog";
 import { createAdminSupabaseClient } from "@/lib/supabase/admin";
 import { createServerSupabaseClient } from "@/lib/supabase/server";
 import { defaultMessageOrigin, isRectificationMessageOrigin } from "@/lib/rectification-agentic/v9/message-origin";
-import { previousInferenceFromReceipt, askedDiscriminatorKeys } from "@/lib/rectification-agentic/v9/inference-adapter";
+import { previousInferenceFromReceipt } from "@/lib/rectification-agentic/v9/inference-adapter";
 import { parseAgentChoiceCopy } from "@/lib/rectification-agentic/v9/choice-card";
 import {
   classifyRectificationTurnIntent,
   optionIdForAnswerClass,
 } from "@/lib/rectification-agentic/v9/turn-intent-classifier";
-import { decideFromDossier, contrastPacketFromDossier } from "@/lib/rectification-agentic/v9/decision-from-dossier";
+import { decideFromDossier, rectificationFollowupCatalog } from "@/lib/rectification-agentic/v9/decision-from-dossier";
 import { persistServerOwnedFocus, openQuestionFromPersistedFocus } from "@/lib/rectification-agentic/v9/server-focus";
 import { buildMethodFollowupPlan } from "@/lib/rectification-agentic/v9/method-followup";
-import { refinementFromDecisionReceipt } from "@/lib/rectification-agentic/v9/refinement-packet";
 
 export const runtime = "nodejs";
 export const maxDuration = 240;
@@ -383,17 +382,15 @@ export async function POST(request: Request) {
       } else {
         const decision = decideFromDossier(dossier);
         if (decision.nextAction === "ask_candidate_discriminator") {
-          const refinement = refinementFromDecisionReceipt(dossier.latestResult?.decisionReceipt ?? null);
+          const catalog = rectificationFollowupCatalog(
+            dossier.latestResult,
+            dossier.evidence,
+          );
           const plan = buildMethodFollowupPlan({
             evidence: dossier.evidence,
             declinedTopics: dossier.conversationSummary.declinedSkippedTopics,
             sessionOutcome: "discriminate_candidates",
-            eventProbes: refinement.discriminating_event_probes,
-            askedProbeKeys: askedDiscriminatorKeys(
-              dossier.latestResult?.decisionReceipt,
-              dossier.evidence,
-            ),
-            contrastPacket: contrastPacketFromDossier(dossier),
+            ...catalog,
             candidatesSeparated: false,
           });
           const persisted = await persistServerOwnedFocus({