Implement Monlet MVP stack and UI updates

deploy/grafana/dashboards/monlet-overview.json

@@ -0,0 +1,42 @@
+{
+  "title": "Monlet Overview",
+  "uid": "monlet-overview",
+  "schemaVersion": 39,
+  "version": 1,
+  "refresh": "30s",
+  "time": { "from": "now-1h", "to": "now" },
+  "panels": [
+    {
+      "id": 1,
+      "type": "stat",
+      "title": "Agents by status",
+      "targets": [{ "expr": "monlet_server_agents", "legendFormat": "{{status}}" }],
+      "gridPos": { "h": 6, "w": 8, "x": 0, "y": 0 }
+    },
+    {
+      "id": 2,
+      "type": "stat",
+      "title": "Open incidents",
+      "targets": [{ "expr": "monlet_server_open_incidents" }],
+      "gridPos": { "h": 6, "w": 8, "x": 8, "y": 0 }
+    },
+    {
+      "id": 3,
+      "type": "timeseries",
+      "title": "Events/sec by result",
+      "targets": [
+        { "expr": "rate(monlet_server_events_total[1m])", "legendFormat": "{{result}}" }
+      ],
+      "gridPos": { "h": 8, "w": 16, "x": 0, "y": 6 }
+    },
+    {
+      "id": 4,
+      "type": "timeseries",
+      "title": "Notifications/sec by notifier+result",
+      "targets": [
+        { "expr": "rate(monlet_server_notifications_total[1m])", "legendFormat": "{{notifier}} {{result}}" }
+      ],
+      "gridPos": { "h": 8, "w": 16, "x": 0, "y": 14 }
+    }
+  ]
+}