聊天和回忆录证据检索都走 pgvector，去掉 Postgres FTS/content_tsv，新迁移删掉 content_tsv 列（部署要先 alembic upgrade）。

Embedding 端口增加 is_available()，聊天和回忆录日志用统一方式表示向量是否真能调用。

记忆整理（compaction）支持 Beat 定期扫用户；

事实抽取提示与 subject 归一化，减少同一人多种称呼；

api/docs/memoir_reliability.md

@@ -15,7 +15,8 @@ This document summarizes production-oriented behavior for the memoir narrative p
 | `memoir_fidelity_fail_open_on_parse_error` | `False` | When `True`, fidelity JSON/LLM failures pass the gate even for new stories (rollback only via ops need). |
 | `memoir_narrative_evidence_overlap_min_chars` | `14` | Deterministic overlap check between body and evidence plain text. |
 | `memoir_title_slots_require_body_or_oral_match` | `True` | Narrows title-generation slot inputs to body/oral overlap. |
-| `memory_fact_search_use_recent_fallback` | `False` | When `False`, fact FTS misses do **not** fall back to “recent confirmed facts” (reduces contradictory/unrelated facts in prompts). |
+| `memory_fact_search_use_recent_fallback` | `False` | When `False`, fact ILIKE misses do **not** fall back to “recent confirmed facts” (reduces contradictory/unrelated facts in prompts). |
+| `memory_compaction_enabled` | `True` | Near-duplicate chunk soft-exclude; requires Celery worker + **Beat** for periodic `memory_compaction_sweep`. |
 | `memoir_recompose_retry_on_lock_contention` | `True` | Chapter recompose retries with backoff when the chapter pipeline lock is held. |
 | `memoir_phase2_singleflight_immediate` | `True` | Immediate Phase 2 `send_task` uses a stable `task_id` per user/category to reduce duplicate queue entries. |
 | `chapter_pipeline_lock_ttl_seconds` | `360` | Shared lock TTL for Phase 2 and `recompose_chapter`; tune with longest expected runtimes. |