feat(api)!: memory single chain — async MemoryService, strict eval closure

Route all memory ingest/retrieve/enrichment/compaction through async MemoryService.
Remove legacy sync memory implementations (ingest/retrieve/compaction); Celery and
memoir Phase2 call asyncio.run into MemoryService-backed helpers.

Memoir Phase1 batch ingest uses MemoryService.ingest_transcripts_batch; drop chapters.
evidence_bundle_json mirror (Alembic 0015). Evaluation uses snapshot/link-only bundles;
raise EvidenceClosureMissing instead of partial/fallback lineage tiers.

Split memoir state into NarrativeCoverageState and InterviewControlState; delete the
_interview_meta_store adapter layer. Remove rolling-query and recent-fact fallback
settings from config and evidence assembly.

Update judges, docs, tests, and PlaygroundPage alignment.

Made-with: Cursor

api/docs/memoir_reliability.md

@@ -15,7 +15,6 @@ 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 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. |