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/adapters/messaging/topology.py

@@ -1,19 +1,19 @@
 """Messaging topology constants + builders (REQ-021, dcy-006 OQ-2).
 
 Three patterns:
-  1. snapshot RPC  — direct queue `trex.snapshot.req`,  reply via amq.rabbitmq.reply-to
+  1. slots RPC    — direct queue `trex.slots.req`,     reply via amq.rabbitmq.reply-to
   2. intent  RPC  — direct queue `trex.intent.req`,    reply via amq.rabbitmq.reply-to
   3. events       — topic exchange `trex.events`,      routing key {event_type}.{strategy_id}.{symbol}
 
-Mapping principle: requests carry view/strategy_id in *payload*; events carry
+Mapping principle: requests carry filter/spy in *payload*; events carry
 strategy_id/symbol in the *routing key* so brokers can filter per-strategy
 queues with patterns like `*.{strategy_id}.#`.
 """
 from __future__ import annotations
 
-# --- RPC queues (durable for intent; transient-ish for snapshot but kept
+# --- RPC queues (durable for intent; transient-ish for slots but kept
 #     durable for simplicity since the queue itself is shared) ---
-SNAPSHOT_REQ_QUEUE = "trex.snapshot.req"
+SLOTS_REQ_QUEUE = "trex.slots.req"      # REQ-073 / dcy-025: replaces snapshot.req
 INTENT_REQ_QUEUE = "trex.intent.req"
 PAUSE_REQ_QUEUE = "trex.pause.req"      # BAT-008 / REQ-032 (legacy alias of control)
 CONTROL_REQ_QUEUE = "trex.control.req"  # BAT-012 / REQ-043 operator control channel
@@ -40,8 +40,8 @@ def intent_queue(instance_key: str | None = DEFAULT_INSTANCE_KEY) -> str:
     return _instance_queue(INTENT_REQ_QUEUE, instance_key)
 
 
-def snapshot_queue(instance_key: str | None = DEFAULT_INSTANCE_KEY) -> str:
-    return _instance_queue(SNAPSHOT_REQ_QUEUE, instance_key)
+def slots_queue(instance_key: str | None = DEFAULT_INSTANCE_KEY) -> str:
+    return _instance_queue(SLOTS_REQ_QUEUE, instance_key)
 
 
 def control_queue(instance_key: str | None = DEFAULT_INSTANCE_KEY) -> str: