feat(alarm): trex-core 알람 emitter + trex.alerts exchange (dcy-033 BAT-049, Implemented)

AlarmEmitter(application, best-effort 비차단)+trex.alerts topic exchange 가산·격리+8 CRITICAL code 배선. 608 passed, opus QC PASS, 팀장 e2e(텔레그램 HTTP200) 통과. REQ-098~101 Implemented.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01VHtM5Ws1HKCKQ4JGi6GRb5

trex_core/application/snapshot_scheduler.py

@@ -12,6 +12,7 @@ import threading
 from datetime import datetime, time, timedelta, timezone
 from typing import Callable, Optional
 
+from trex_core.application.alarm_emitter import AlarmEmitter
 from trex_core.application.broker_port import BrokerPort
 from trex_core.application.portfolio import (
     DegradedReason,
@@ -40,6 +41,7 @@ class SnapshotScheduler:
         slot_repo=None,
         slot_service=None,
         instance_key: str = "default",
+        alarm_emitter: Optional[AlarmEmitter] = None,
     ) -> None:
         self._read = read_port
         self._store = store
@@ -55,6 +57,8 @@ class SnapshotScheduler:
         self._slot_service = slot_service
         self._instance_key = instance_key
         self._last_universe_size: Optional[int] = None
+        # dcy-033 / REQ-100: best-effort alarm emitter.
+        self._alarm_emitter = alarm_emitter
 
     # ---- callable from a daemon thread loop --------------------------------
     def run_forever(self, stop: threading.Event, *, tick_sec: float = 60.0) -> None:
@@ -88,6 +92,13 @@ class SnapshotScheduler:
                     DegradedReason.PORTFOLIO_HUB_UNAVAILABLE, str(exc)
                 )
                 _log.warning("whoami failed: %s", exc)
+                # dcy-033 / REQ-100: CRITICAL alarm — portfolio hub unavailable.
+                if self._alarm_emitter is not None:
+                    self._alarm_emitter.publish_alarm(
+                        "portfolio_hub_unavailable",
+                        "portfolio-hub whoami 실패: 포트폴리오 정보 부실화",
+                        fields={"reason": "whoami_failed"},
+                    )
                 return False
         try:
             items = self._read.get_portfolios(self._daemon_id)
@@ -96,6 +107,13 @@ class SnapshotScheduler:
                 DegradedReason.PORTFOLIO_HUB_UNAVAILABLE, str(exc)
             )
             _log.warning("get_portfolios failed: %s", exc)
+            # dcy-033 / REQ-100: CRITICAL alarm — portfolio hub unavailable.
+            if self._alarm_emitter is not None:
+                self._alarm_emitter.publish_alarm(
+                    "portfolio_hub_unavailable",
+                    "portfolio-hub get_portfolios 실패: 포트폴리오 정보 부실화",
+                    fields={"daemon_id": self._daemon_id, "reason": "get_portfolios_failed"},
+                )
             return False
         except Exception as exc:  # noqa: BLE001 - shape/parsing failure
             self._store.set_degraded(
@@ -120,6 +138,7 @@ class SnapshotScheduler:
                     reconcile_core_holdings(
                         slot_repo=self._slot_repo, slot_service=self._slot_service,
                         broker=self._broker, instance_key=self._instance_key,
+                        alarm_emitter=self._alarm_emitter,  # dcy-033 / REQ-100
                     )
                 except Exception:  # noqa: BLE001
                     _log.exception("core-holding divergence reconcile failed")