feat(api): 访谈路径轻量门控、Memoir Phase1 批处理与叙事/记忆管线加固

- 新增 utterance_substance：短时/应答/元话语可跳过记忆检索、阶段 LLM 与资料抽取 LLM；可配置
- 输入归一化：LLM 模式默认仅语音/ASR；配置项写入 .env.example
- Memoir Phase1：可选 batch LLM 一次性抽取+分类（失败回退逐段）；Extraction 空槽位时阶段与 current_stage 对齐，prompt 约束收紧
- 叙事与忠实度：narrative_safety、证据重叠/场合锚点、标题 slots 与履历短语 grounded；fidelity 解析失败 fail-open 可配置
- 章节管线：锁 TTL 上调、锁竞争 Celery 重试、Phase2 immediate singleflight 等；story_pipeline_sync / chapter_compose / memoir_tasks 联动
- Memory：compaction / repo / summarizer / evidence 小修；事实 FTS 未命中是否回退最近事实可配置
- 新增 memoir_pipeline_trace；补充 memoir_reliability 文档与多项回归/门控测试

api/app/features/memory/compaction_service.py

@@ -21,6 +21,7 @@ from app.features.memory.repo import (
     get_first_chunk_after_cursor_sync,
     get_memory_chunk_sync,
     list_incremental_chunks_for_compaction_sync,
+    mark_facts_stale_for_excluded_chunk_sync,
     search_nearest_chunks_for_compaction_sync,
     set_chunk_excluded_sync,
 )
@@ -111,6 +112,7 @@ def _build_curation_details(
         "trigger_source",
         "trigger_time",
         "pipeline_run_id",
+        "memoir_correlation_id",
         "request_id",
         "story_ids",
         "story_dispatch_ids",
@@ -414,6 +416,16 @@ def run_memory_compaction_sync(
             ok = set_chunk_excluded_sync(session, loser_id, user_id, True)
             if not ok:
                 continue
+            stale_n = mark_facts_stale_for_excluded_chunk_sync(
+                session, user_id=user_id, chunk_id=loser_id
+            )
+            if stale_n:
+                logger.info(
+                    "memory_compaction_facts_staled user_id={} chunk_id={} count={}",
+                    user_id,
+                    loser_id,
+                    stale_n,
+                )
             create_curation_action_sync(
                 session,
                 user_id=user_id,