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/assistantDeepTurnPackaging.ts

@@ -17,6 +17,7 @@ import { assembleAssistantContractsBundleV1, type AssistantContractsBundleV1 } f
 import { buildDeepAnswerArtifacts, buildAssistantConversationItem, type DeepAnswerArtifacts } from "./assistantDeepResponseAssembler";
 import { buildDeepAnalysisDebugPayload } from "./assistantDebugPayloadAssembler";
 import { buildDeepAnalysisProcessedLogDetails } from "./assistantMessageLogAssembler";
+import type { AssistantFollowupUsage } from "./assistantFollowupUsage";
 
 export interface AssistantDeepTurnPackagingInput {
   sessionId: string;
@@ -79,7 +80,7 @@ export interface AssistantDeepTurnPackagingInput {
   rbpLiveRouteAudit: unknown | null;
   faLiveRouteAudit: unknown | null;
   groundedAnswerEligibilityGuard: Record<string, unknown>;
-  followupStateUsage: unknown | null;
+  followupStateUsage: AssistantFollowupUsage | null;
   composition: {
     reply_type: AssistantReplyType;
     fallback_type: unknown;