feat: метрики использования каждой NER-модели и панели дашборда

- Добавлены счётчики pdguard.ner.model.requests и таймеры
  pdguard.ner.model.duration с тегом model (name/address/legal).
- Гистограммы для таймеров моделей включены в MetricsConfiguration.
- Дашборд дополнен панелями «Обращения к моделям» и «Время моделей».
- Prometheus собирает метрики с обеих нод кластера.
- Целевые значения лимитера: min-concurrent 100, target-latency 900.
- Подавление S2925 (Thread.sleep) в тесте лимитера.

monitoring/grafana/dashboards/pd-guard.json

@@ -2149,6 +2149,136 @@
         }
       }
     },
+    {
+      "type": "timeseries",
+      "title": "Обращения к моделям",
+      "id": 49,
+      "datasource": {
+        "type": "prometheus",
+        "uid": "PDGUARD_PROM"
+      },
+      "gridPos": {
+        "h": 8,
+        "w": 12,
+        "x": 0,
+        "y": 74
+      },
+      "targets": [
+        {
+          "datasource": {
+            "type": "prometheus",
+            "uid": "PDGUARD_PROM"
+          },
+          "expr": "sum by (model) (rate(pdguard_ner_model_requests_total[$__rate_interval]))",
+          "refId": "A",
+          "instant": false,
+          "legendFormat": "{{model}}"
+        }
+      ],
+      "fieldConfig": {
+        "defaults": {
+          "unit": "reqps",
+          "custom": {
+            "fillOpacity": 45,
+            "lineWidth": 2,
+            "showPoints": "never",
+            "stacking": {
+              "mode": "normal"
+            }
+          },
+          "thresholds": {
+            "mode": "absolute",
+            "steps": [
+              {
+                "color": "text",
+                "value": null
+              }
+            ]
+          }
+        },
+        "overrides": []
+      },
+      "options": {
+        "legend": {
+          "displayMode": "table",
+          "placement": "bottom",
+          "calcs": [
+            "mean",
+            "max"
+          ],
+          "showLegend": true
+        },
+        "tooltip": {
+          "mode": "multi",
+          "sort": "desc"
+        }
+      }
+    },
+    {
+      "type": "timeseries",
+      "title": "Время моделей",
+      "id": 50,
+      "datasource": {
+        "type": "prometheus",
+        "uid": "PDGUARD_PROM"
+      },
+      "gridPos": {
+        "h": 8,
+        "w": 12,
+        "x": 12,
+        "y": 74
+      },
+      "targets": [
+        {
+          "datasource": {
+            "type": "prometheus",
+            "uid": "PDGUARD_PROM"
+          },
+          "expr": "histogram_quantile(0.95, sum by (le, model) (rate(pdguard_ner_model_duration_seconds_bucket[$__rate_interval])))",
+          "refId": "A",
+          "instant": false,
+          "legendFormat": "{{model}} p95"
+        }
+      ],
+      "fieldConfig": {
+        "defaults": {
+          "unit": "s",
+          "custom": {
+            "fillOpacity": 12,
+            "lineWidth": 2,
+            "showPoints": "never",
+            "stacking": {
+              "mode": "none"
+            }
+          },
+          "thresholds": {
+            "mode": "absolute",
+            "steps": [
+              {
+                "color": "text",
+                "value": null
+              }
+            ]
+          }
+        },
+        "overrides": []
+      },
+      "options": {
+        "legend": {
+          "displayMode": "table",
+          "placement": "bottom",
+          "calcs": [
+            "mean",
+            "max"
+          ],
+          "showLegend": true
+        },
+        "tooltip": {
+          "mode": "multi",
+          "sort": "desc"
+        }
+      }
+    },
     {
       "type": "row",
       "title": "Ресурсы узла",
@@ -2157,7 +2287,7 @@
         "h": 1,
         "w": 24,
         "x": 0,
-        "y": 74
+        "y": 90
       },
       "collapsed": false
     },
@@ -2173,7 +2303,7 @@
         "h": 5,
         "w": 4,
         "x": 0,
-        "y": 75
+        "y": 91
       },
       "targets": [
         {
@@ -2236,7 +2366,7 @@
         "h": 5,
         "w": 4,
         "x": 4,
-        "y": 75
+        "y": 91
       },
       "targets": [
         {
@@ -2291,7 +2421,7 @@
         "h": 5,
         "w": 4,
         "x": 8,
-        "y": 75
+        "y": 91
       },
       "targets": [
         {
@@ -2346,7 +2476,7 @@
         "h": 5,
         "w": 4,
         "x": 12,
-        "y": 75
+        "y": 91
       },
       "targets": [
         {
@@ -2409,7 +2539,7 @@
         "h": 5,
         "w": 4,
         "x": 16,
-        "y": 75
+        "y": 91
       },
       "targets": [
         {
@@ -2464,7 +2594,7 @@
         "h": 5,
         "w": 4,
         "x": 20,
-        "y": 75
+        "y": 91
       },
       "targets": [
         {
@@ -2523,7 +2653,7 @@
         "h": 8,
         "w": 12,
         "x": 0,
-        "y": 80
+        "y": 96
       },
       "targets": [
         {
@@ -2588,7 +2718,7 @@
         "h": 8,
         "w": 12,
         "x": 12,
-        "y": 80
+        "y": 96
       },
       "targets": [
         {
@@ -2643,4 +2773,4 @@
       }
     }
   ]
-}
+}