fix(broker): enforce operator broker truth boundary

docs/project-structure.md

@@ -92,6 +92,7 @@
 │   └── runtime/                  # 데몬 (BAT-002, BAT-004, BAT-006, BAT-007, BAT-008)
 │       ├── config.py             # DaemonConfig(+instance_key, max_active_slots) + KISConfig + PortfolioHubConfig + RabbitMQConfig + SnapshotScheduleConfig + SafetySellConfig + DaemonInstanceConfig.from_toml/from_config (env + per-instance TOML, BAT-013/028/030)
 │       ├── daemon.py             # Daemon class: `--config` TOML 진입점(BAT-013) + setup(migrate/reconcile/declare-topology(instance_key)) + 7 worker threads(instance_key 큐 구독) + WatchdogStore + KillSwitchService + graceful shutdown. _execution_loop 각 틱 시작 시 event_publisher.keepalive_tick() 호출(REQ-092). _make_event_emitter 발행 최종 실패 시 ERROR 로그(REQ-093).
+│       ├── broker_provider.py    # daemon/CLI 공용 broker source resolution: KIS fetched/env/break-glass와 day-scoped fetched credential 재사용 (BAT-057 / REQ-119)
 │       ├── reset.py             # trex-core-reset: slot-core 테이블 wipe + 자산 중심 재초기화 (REQ-064, BAT-030)
 │       ├── logging_setup.py      # 구조화 로깅(ISO8601 KST·레벨·Loki JSON·correlation id) + configure_logging (BAT-045 / REQ-084, dcy-029)
 │       └── cli.py                # trex-core CLI: pause/resume/paused + universe/slots/enter/exit/cancel + report(REQ-088) (BAT-008/020/046 / REQ-032)