ГЛОБАЛЬНЫЙ РЕФАКТОРИНГ АРХИТЕКТУРЫ - Этап 4.2: унифицирован fallback-ответ в 5-блочный контракт и обновлены регрессии

docs/TECH/1CLLMARCH-FACT.md

@@ -2651,7 +2651,23 @@ Implemented in current pass (Stage 4.1 answer-layer contract rollout, 2026-04-12
    - focused Stage 4 answer pack: `5 files / 30 tests passed`;
    - `npm --prefix llm_normalizer/backend run build` passed.
 
-Status: In progress (Stage 4.1 completed; continue with quality loop on real runs/manual comments)
+Implemented in current pass (Stage 4.2 boundary fallback contract alignment, 2026-04-12):
+1. Reworked boundary fallback replies to the same Stage 4 human-centric contract shape:
+   - `Коротко`
+   - `Что именно проверено`
+   - `Что найдено`
+   - `Что пока не доказано`
+   - `Что могу сделать сейчас`
+2. Preserved fallback semantics and safety behavior:
+   - soft refusal and clarification flow remain deterministic;
+   - no route/runtime contract changes.
+3. Updated boundary regression assertions to the unified Stage 4 answer shape:
+   - `assistantBoundaryFallbackReply`.
+4. Validation snapshot:
+   - focused Stage 4 pack passed: `4 files / 16 tests` (`assistantBoundaryFallbackReply`, `assistantSoftPolicyReply`, `assistantAnswerPolicyV11`, `assistantWave17RunRegression20260411`);
+   - `npm --prefix llm_normalizer/backend run build` passed.
+
+Status: In progress (Stage 4.1-4.2 completed; continue with quality loop on real runs/manual comments)
 
 ## Stage 5 (P3): Quality Loop Driven By GUI Markup