fix(agent99): reduce SSH performance probe churn

agent99.config.example.json

@@ -222,13 +222,23 @@
   "performance": {
     "enabled": true,
     "intervalMinutes": 1,
+    "nodeExporterTimeoutSeconds": 8,
+    "nodeExporterUrls": {
+      "192.168.0.110": "http://192.168.0.110:9100/metrics",
+      "192.168.0.112": "http://192.168.0.112:9100/metrics",
+      "192.168.0.188": "http://192.168.0.188:9100/metrics"
+    },
     "loadPerCoreWarning": 0.9,
     "loadPerCoreCritical": 1.5,
     "memoryAvailablePercentCritical": 10,
+    "kernelPercpuMemoryPercentWarning": 10,
+    "kernelPercpuMemoryPercentCritical": 20,
+    "kernelSUnreclaimMemoryPercentCritical": 25,
     "diskUsedPercentWarning": 90,
     "diskUsedPercentCritical": 95,
     "captureTopCpuOnWarning": true,
     "topCpuTimeoutSeconds": 10,
+    "topCpuDiagnosticCooldownMinutes": 15,
     "loadShedding": {
       "enabled": true,
       "actions": []