ГЛОБАЛЬНЫЙ РЕФАКТОРИНГ АРХИТЕКТУРЫ - Рефакторинг этапов 2.89 - 2.92 и 2.93 - 2.96 - Ужесточение deep-turn финализацию/response контракт debug до строго AssistantDebugPayload / Вынен общий контракт followup-usage и helper / Протянут typed followupUsage по deep-turn цепочке и убрал inline-cast проверки applied

llm_normalizer/backend/src/services/assistantDeepTurnInputBuilder.ts

@@ -2,6 +2,7 @@ import type { AssistantReplyType, AssistantRequirement, AnswerGroundingCheck, Re
 import type { NormalizeResponsePayload, RouteHintSummary } from "../types/normalizer";
 import type { AnswerStructureV11 } from "../types/stage1Contracts";
 import type { AssistantDeepTurnPackagingInput } from "./assistantDeepTurnPackaging";
+import type { AssistantFollowupUsage } from "./assistantFollowupUsage";
 
 export interface AssistantDeepTurnInputBuilderArgs {
   sessionId: string;
@@ -64,7 +65,7 @@ export interface AssistantDeepTurnInputBuilderArgs {
   rbpLiveRouteAudit: unknown | null;
   faLiveRouteAudit: unknown | null;
   groundedAnswerEligibilityGuard: Record<string, unknown>;
-  followupStateUsage?: unknown;
+  followupStateUsage?: AssistantFollowupUsage | null;
   composition: {
     reply_type: AssistantReplyType;
     fallback_type: unknown;