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/runtime/reset.py

@@ -29,6 +29,21 @@ from typing import Any, Optional
 
 _log = logging.getLogger(__name__)
 
+
+def _emit_reset_alarm(
+    alarm_emitter: Optional[object],
+    code: str,
+    title: str,
+    fields: dict | None = None,
+) -> None:
+    """Best-effort alarm from reset.py (transport may be None — dcy-033 / REQ-100 KD-2)."""
+    if alarm_emitter is None:
+        return
+    try:
+        alarm_emitter.publish_alarm(code, title, fields=fields)  # type: ignore[union-attr]
+    except Exception:  # noqa: BLE001
+        _log.debug("reset alarm emit failed (code=%s)", code, exc_info=True)
+
 # slot-core tables owned by trex-core migrations (drop order irrelevant — no FKs).
 SLOT_CORE_TABLES: tuple[str, ...] = (
     "daily_slot",
@@ -74,6 +89,7 @@ def run_reset(
     *,
     dry_run: bool = True,
     psycopg_module: Any = None,
+    alarm_emitter: Optional[object] = None,
 ) -> ResetReport:
     """Wipe the slot-core tables and reapply migrations to the asset-centric schema.
 
@@ -106,7 +122,17 @@ def run_reset(
     # 010 sets the inactive CHECK, 011 drops the pool-model columns.
     from trex_core.adapters.persistence.migrate import apply_migrations
 
-    report.migrations_applied = apply_migrations(dsn, psycopg_module=psycopg_module)
+    try:
+        report.migrations_applied = apply_migrations(dsn, psycopg_module=psycopg_module)
+    except Exception as mig_exc:  # noqa: BLE001
+        # dcy-033 / REQ-100: CRITICAL alarm — migration failed.
+        _emit_reset_alarm(
+            alarm_emitter,
+            "migration_failed",
+            f"마이그레이션 실패: {mig_exc.__class__.__name__}",
+            fields={"error": str(mig_exc)},
+        )
+        raise
 
     from trex_core.domain.slot import EXPECTED_SLOT_FIELDS
 
@@ -118,6 +144,14 @@ def run_reset(
             )
             cols = {r[0] for r in cur.fetchall()}
     report.schema_ok = cols == set(EXPECTED_SLOT_FIELDS)
+    if not report.schema_ok:
+        # dcy-033 / REQ-100: CRITICAL alarm — schema verification failed post-reset.
+        _emit_reset_alarm(
+            alarm_emitter,
+            "schema_verification_failed",
+            "리셋 후 schema 검증 실패: daily_slot 컬럼 불일치",
+            fields={"expected": sorted(EXPECTED_SLOT_FIELDS), "actual": sorted(cols)},
+        )
     return report