feat(heartbeat): emit heartbeat event to SQLite

channel-service/tests/test_api.py

@@ -1,6 +1,8 @@
 from fastapi.testclient import TestClient
 
 from app.main import app
+from app.models.event import EventType
+from app.repositories.event_store import event_store
 
 client = TestClient(app)
 
@@ -64,6 +66,18 @@ def test_heartbeat_and_monitor():
     assert any(c["account_id"] == "bot-003" and c["risk_level"] == 10 for c in clients)
 
 
+def test_heartbeat_creates_event():
+    event_store.cleanup(0)
+    client.post("/v1/heartbeat", json={
+        "account_id": "bot-heartbeat",
+        "tenant_code": "rescue",
+        "risk_level": 10,
+        "sent_count_today": 5,
+    })
+    pending = event_store.fetch_pending(limit=10)
+    assert any(e.event_type == EventType.HEARTBEAT and e.tenant_code == "rescue" for e in pending)
+
+
 def test_monitor_page():
     r = client.get("/monitor")
     assert r.status_code == 200