Implement Monlet MVP stack and UI updates

server/tests/test_metrics.py

@@ -0,0 +1,18 @@
+import pytest
+
+from ._helpers import make_event, make_heartbeat
+
+
+@pytest.mark.asyncio
+async def test_metrics_endpoint(app_client, auth_headers):
+    await app_client.post("/api/v1/heartbeat", json=make_heartbeat(), headers=auth_headers)
+    ev = make_event(status="critical", exit_code=2)
+    await app_client.post(
+        "/api/v1/events", json={"agent_id": "agent-1", "events": [ev]}, headers=auth_headers
+    )
+    r = await app_client.get("/metrics")
+    assert r.status_code == 200
+    body = r.text
+    assert "monlet_server_heartbeats_total" in body
+    assert "monlet_server_events_total" in body
+    assert "monlet_server_incidents_opened_total" in body