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>

trex_core/runtime/config.py

@@ -148,6 +148,9 @@ class DaemonInstanceConfig:
     # dcy-022 / REQ-068: default order timeout in seconds (opt-in per instance).
     # None = OFF = indefinite wait (legacy behavior). Per-intent timeout_sec overrides.
     default_order_timeout_sec: Optional[int] = None
+    # dcy-024 / REQ-048 CHG-20260611-01: disable autonomous safety-sell worker.
+    # Absent = True (safe default). False → trex-safety-sell thread not started.
+    safety_sell_enabled: bool = True
 
     @staticmethod
     def from_toml(path: str) -> "DaemonInstanceConfig":
@@ -178,6 +181,7 @@ class DaemonInstanceConfig:
             trading_timezone=str(data.get("trading_timezone") or "Asia/Seoul"),
             max_active_slots=max_active,
             default_order_timeout_sec=default_timeout,
+            safety_sell_enabled=bool(data.get("safety_sell_enabled", True)),
         )
 
 
@@ -216,6 +220,9 @@ class DaemonConfig:
     # dcy-014 / REQ-048: operator-local timezone (CLI date display etc.). The
     # daily preallocation trigger was removed with the pool model (BAT-030).
     trading_timezone: str = "Asia/Seoul"
+    # dcy-024 / REQ-005 CHG-20260611-01: disable autonomous safety-sell worker.
+    # False → trex-safety-sell thread not started in daemon.start().
+    safety_sell_enabled: bool = True
     # dcy-015 / REQ-019 (BAT-019): ledger outbox retry backoff. base*2^(n-1)
     # capped at cap (+jitter); after max_attempts a retryable row dead-letters.
     ledger_retry_base_sec: float = 1.0
@@ -335,4 +342,5 @@ class DaemonConfig:
             portfolio_hub=pf,
             trading_timezone=inst.trading_timezone,
             max_active_slots=inst.max_active_slots,
+            safety_sell_enabled=inst.safety_sell_enabled,
         )