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/daemon.py

@@ -53,7 +53,7 @@ from trex_core.application.killswitch import KillSwitchService
 from trex_core.application.messaging_handlers import (
     make_control_rpc_handler,
     make_intent_rpc_handler,
-    make_snapshot_rpc_handler,
+    make_slots_rpc_handler,
     slot_transition_event_payload,
 )
 from trex_core.application.portfolio import (
@@ -259,26 +259,24 @@ class Daemon:
         transport.consume_rpc_forever(
             topology.intent_queue(self.config.instance_key), handler, self.stop)
 
-    def _snapshot_rpc_loop(self) -> None:
+    def _slots_rpc_loop(self) -> None:
         transport = _build_transport(self.config)
         self._transports.append(transport)
         try:
             transport.declare_topology(self.config.instance_key)
         except Exception:  # noqa: BLE001
             pass
-        handler = make_snapshot_rpc_handler(
-            self.slot_repo, self.slot_service,
+        handler = make_slots_rpc_handler(
+            self.slot_repo,
             instance_key=self.config.instance_key,
             snapshot_store=self.snapshot_store,
             pause_store=self.pause_store,
-            max_active_slots=self.config.max_active_slots,
             watchdog_store=self.watchdog,
             watchdog_timeout_sec=self.config.safety_sell.watchdog_timeout_sec,
-            killswitch_store=self.killswitch_store,
-            ledger_outbox=self.outbox,  # dcy-018 / REQ-029: estimated-cash overlay
+            ledger_outbox=self.outbox,
         )
         transport.consume_rpc_forever(
-            topology.snapshot_queue(self.config.instance_key), handler, self.stop)
+            topology.slots_queue(self.config.instance_key), handler, self.stop)
 
     def _control_rpc_loop(self) -> None:
         # REQ-043: operator control channel (pause/resume/list + kill_switch/resume_kill_switch).
@@ -329,11 +327,17 @@ class Daemon:
             ("trex-execution", self._execution_loop),
             ("trex-ledger", self._ledger_loop),
             ("trex-intent-rpc", self._intent_rpc_loop),
-            ("trex-snapshot-rpc", self._snapshot_rpc_loop),
+            ("trex-slots-rpc", self._slots_rpc_loop),
             ("trex-control-rpc", self._control_rpc_loop),
             ("trex-snapshot-scheduler", self._snapshot_scheduler_loop),
-            ("trex-safety-sell", self._safety_sell_loop),
         ]
+        if self.config.safety_sell_enabled:
+            workers.append(("trex-safety-sell", self._safety_sell_loop))
+        else:
+            _log.warning(
+                "safety_sell_enabled=false — trex-safety-sell worker not started. "
+                "Autonomous safety-sell will NOT run."
+            )
         for name, target in workers:
             t = threading.Thread(target=target, name=name, daemon=True)
             t.start()