feat(rel-007): dcy-025/024 + BAT-035/036 — slots.req 즉시 교체 + safety_sell_enabled

BAT-035 (dcy-025): trex.snapshot.req → trex.slots.req 즉시 교체
- topology: SNAPSHOT_REQ_QUEUE 제거, SLOTS_REQ_QUEUE = "trex.slots.req" 추가
- portfolio.py: View/build_snapshot_envelope/SnapshotEnvelope/_asset_to_dict 제거;
  slot_to_dict 시그니처 확장(snapshot_store/watchdog_store/pause_store/watchdog_timeout_sec)
  — asset_quantity(hub)/cash_balance/cash_estimated/warned/watchdog{}/paused 병합 (REQ-074)
- messaging_handlers.py: make_snapshot_rpc_handler 제거, make_slots_rpc_handler 추가
  — filter(all/inactive/pending/holding/error) + spy(bool) 처리; strategy 필드 제외 (REQ-073/074)
- daemon.py: _snapshot_rpc_loop → _slots_rpc_loop, make_slots_rpc_handler 연결
- cli.py: universe/slots → slots_queue + spy=True + server-side filter; buyable→inactive 매핑 (REQ-063)
- rabbitmq.py: snapshot_queue → slots_queue
- docs: interface-contract.md + runtime-flows.md slots.req 계약으로 업데이트 (REQ-075)
- REQ-028: Implemented → Deprecated (코드 삭제 완료)
- 테스트: test_snapshot_handler/selection/rpc_watchdog/messaging_snapshot_consumer 삭제;
  test_slots_handler.py(신규, 13 cases), test_killswitch_masking_resume 재작성,
  test_ledger_option_d._apply_cash_estimate → slots handler 경유, test_topology/cli_operator 갱신

BAT-036 (dcy-024): per-instance safety_sell_enabled 플래그
- config.py: DaemonInstanceConfig + DaemonConfig 에 safety_sell_enabled: bool = True 추가;
  from_toml 파싱, from_config 전파
- daemon.py: start() workers 조건부 — safety_sell_enabled=false 시 trex-safety-sell 미기동 + WARNING
- tests: test_instance_config.py 에 safety_sell_enabled 파싱 3개 케이스 추가

REQ: 073/074/075/021/034/063/048/005 Approved → Implemented

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

docs/discovery/index.md

@@ -29,3 +29,5 @@
 | dcy-021_20260610_position-sizing-target-intent | 20260610 | 포지션 사이징 — 활성 자산 슬롯 보유 수량 변경(HOLDING→HOLDING)·부분 매도·선언형 target intent (issue #1, dcy-020 OQ-4 후속) | [Discovery](./dcy-021_20260610_position-sizing-target-intent.md) | confirmed |
 | dcy-022_20260610_stuck-pending-order-recovery | 20260610 | 전략 발신 intent 실행 정책 — 주문 timeout(TIF)/슬리피지 허용 + 미체결 고착 백스톱 (issue #21, dcy-020/021 모델 전제) | [Discovery](./dcy-022_20260610_stuck-pending-order-recovery.md) | confirmed |
 | dcy-023_20260610_allocated-capital-dead-field-removal | 20260610 | allocated_capital 죽은 필드 제거 — `enter --capital` 옵션 + slot/intent/snapshot 계약 정리 (issue #22) | [Discovery](./dcy-023_20260610_allocated-capital-dead-field-removal.md) | confirmed |
+| dcy-024_20260611_safety-sell-disable-mode | 20260611 | safety-sell 자율 청산 비활성화 모드 — per-instance TOML `safety_sell_enabled=false` 시 워커 미기동 (issue #15) | [Discovery](./dcy-024_20260611_safety-sell-disable-mode.md) | confirmed |
+| dcy-025_20260611_strategy-read-surface-slots-req | 20260611 | 전략 read 표면 재설계 — `trex.snapshot.req`→`trex.slots.req` + 슬롯 상태 필터 + 슬롯 단일 행(assets[]/available_slots/watchdog[] 흡수·제거) | [Discovery](./dcy-025_20260611_strategy-read-surface-slots-req.md) | confirmed |