ARCH: сохранять metadata ambiguity через clarification follow-up

llm_normalizer/backend/tests/assistantMcpDiscoveryTurnInputAdapter.test.ts

@@ -595,6 +595,7 @@ describe("assistant MCP discovery turn input adapter", () => {
       asked_domain_family: "metadata",
       asked_action_family: "resolve_next_lane",
       explicit_entity_candidates: ["SVK"],
+      metadata_ambiguity_entity_sets: ["Документ", "РегистрНакопления"],
       explicit_date_scope: "2020",
       unsupported_but_understood_family: "metadata_lane_choice_clarification",
       stale_replay_forbidden: true

llm_normalizer/backend/tests/assistantTransitionPolicy.test.ts

@@ -1227,6 +1227,61 @@ describe("assistantTransitionPolicy", () => {
       "РегистрНакопления"
     ]);
   });
+  it("preserves metadata ambiguity choice sets through a clarification assistant turn", () => {
+    const policy = buildPolicy({
+      findLastAddressAssistantItem: () => ({
+        text: "уточните: по документам или по движениям?",
+        debug: {
+          execution_lane: "living_chat",
+          mcp_discovery_response_applied: true,
+          assistant_mcp_discovery_entry_point_v1: {
+            schema_version: "assistant_mcp_discovery_runtime_entry_point_v1",
+            entry_status: "bridge_executed",
+            turn_input: {
+              turn_meaning_ref: {
+                asked_domain_family: "metadata",
+                asked_action_family: "resolve_next_lane",
+                explicit_entity_candidates: ["SVK"],
+                metadata_ambiguity_entity_sets: ["Документ", "РегистрНакопления"],
+                explicit_date_scope: "2020",
+                unsupported_but_understood_family: "metadata_lane_choice_clarification"
+              }
+            },
+            bridge: {
+              bridge_status: "needs_clarification",
+              business_fact_answer_allowed: false,
+              pilot: {
+                pilot_scope: "metadata_inspection_v1"
+              },
+              answer_draft: {
+                answer_mode: "needs_clarification"
+              }
+            }
+          }
+        }
+      }),
+      hasAddressFollowupContextSignal: () => true,
+      hasReferentialPointer: () => false,
+      resolveAddressIntent: () => ({ intent: "unknown" }),
+      resolveAddressIntentFamily: () => null,
+      resolveAssistantTurnMeaning: () => null
+    });
+
+    const carryover = policy.resolveAddressFollowupCarryoverContext(
+      "по движениям",
+      [{ kind: "assistant", text: "уточните: по документам или по движениям?" }],
+      "по движениям",
+      { predecomposeContract: { intent: "unknown" } },
+      null
+    );
+
+    expect(carryover?.followupContext?.previous_discovery_pilot_scope).toBe("metadata_inspection_v1");
+    expect(carryover?.followupContext?.previous_discovery_metadata_ambiguity_detected).toBe(true);
+    expect(carryover?.followupContext?.previous_discovery_metadata_ambiguity_entity_sets).toEqual([
+      "Документ",
+      "РегистрНакопления"
+    ]);
+  });
   it("switches to VAT tax-period intent while preserving carried period filters", () => {
     const policy = buildPolicy({
       findLastAddressAssistantItem: () => ({