feat(trade-monitor): FastAPI lifespan + heartbeat 배선 + /health

services/trade-monitor/tests/test_health.py

@@ -0,0 +1,6 @@
+"""/health — 라우트 핸들러 직접 검증."""
+from main import health
+
+
+def test_health():
+    assert health() == {"ok": True, "service": "trade-monitor"}