ARCH: довести catalog drilldown от metadata surface до planner chain

llm_normalizer/backend/src/services/assistantMcpDiscoveryPilotExecutor.ts

@@ -613,7 +613,8 @@ function isValueFlowPilotEligible(planner: AssistantMcpDiscoveryPlannerContract)
 function isMetadataPilotEligible(planner: AssistantMcpDiscoveryPlannerContract): boolean {
   if (
     planner.selected_chain_id === "metadata_inspection" ||
-    planner.selected_chain_id === "metadata_lane_clarification"
+    planner.selected_chain_id === "metadata_lane_clarification" ||
+    planner.selected_chain_id === "catalog_drilldown"
   ) {
     return true;
   }
@@ -658,6 +659,23 @@ function metadataScopeForPlanner(planner: AssistantMcpDiscoveryPlannerContract):
   if (entityCandidate) {
     return entityCandidate;
   }
+  if (planner.selected_chain_id === "catalog_drilldown") {
+    const surface = planner.metadata_surface_ref;
+    const scopeCandidate = [
+      ...(surface?.selected_surface_objects ?? []),
+      surface?.selected_entity_set ?? ""
+    ]
+      .map((value) => toNonEmptyString(value))
+      .filter((value): value is string => Boolean(value))
+      .map((value) => {
+        const parts = value.split(".").map((item) => item.trim()).filter((item) => item.length > 0);
+        return parts.length > 0 ? parts[parts.length - 1] ?? value : value;
+      })
+      .find((value) => value.length > 0);
+    if (scopeCandidate) {
+      return scopeCandidate;
+    }
+  }
   const meaning = planner.discovery_plan.turn_meaning_ref;
   const combined = `${meaning?.asked_domain_family ?? ""} ${meaning?.asked_action_family ?? ""} ${meaning?.unsupported_but_understood_family ?? ""}`
     .toLowerCase()
@@ -675,6 +693,12 @@ function metadataScopeForPlanner(planner: AssistantMcpDiscoveryPlannerContract):
 }
 
 function metadataTypesForPlanner(planner: AssistantMcpDiscoveryPlannerContract): string[] {
+  if (planner.selected_chain_id === "catalog_drilldown") {
+    const selectedEntitySet = toNonEmptyString(planner.metadata_surface_ref?.selected_entity_set);
+    if (selectedEntitySet) {
+      return [selectedEntitySet];
+    }
+  }
   const meaning = planner.discovery_plan.turn_meaning_ref;
   const action = String(meaning?.asked_action_family ?? "").toLowerCase();
   if (action === "inspect_registers") {
@@ -2381,6 +2405,7 @@ function buildEmptyEvidence(
 
 function pilotScopeForPlanner(planner: AssistantMcpDiscoveryPlannerContract): AssistantMcpDiscoveryPilotScope {
   switch (planner.selected_chain_id) {
+    case "catalog_drilldown":
     case "metadata_lane_clarification":
     case "metadata_inspection":
       return "metadata_inspection_v1";
@@ -2524,6 +2549,9 @@ export async function executeAssistantMcpDiscoveryPilot(
     let metadataResult: AddressMcpMetadataRowsResult | null = null;
     const metadataScope = metadataScopeForPlanner(planner);
     const requestedMetaTypes = metadataTypesForPlanner(planner);
+    if (planner.selected_chain_id === "catalog_drilldown" && metadataScope) {
+      pushReason(reasonCodes, "pilot_catalog_drilldown_metadata_scope_seeded_from_surface_ref");
+    }
 
     for (const step of dryRun.execution_steps) {
       if (step.primitive_id !== "inspect_1c_metadata") {