feat(telemetry): add load-factor attribution and 7-day agreement panels

Both metrics are already emitted and live in Prometheus but were not fully
visualised.

- Fee Market (xrpld-fee-market.json): "Load Factor Attribution (Stacked
  Components)" — stacks load_factor_fee_escalation / fee_queue / local / net /
  cluster so an operator can see which component drives the effective fee. The
  existing panels showed the aggregate only.
- Validator Health (xrpld-validator-health.json): "Agreement % (7d)" and
  "Agreements vs Missed (7d)" — the xrpld_validation_agreement gauge already
  observes agreement_pct_7d / agreements_7d / missed_7d, but the dashboard only
  plotted 1h and 24h windows.

Panels follow the existing template: $node filter, exported_instance in legends,
Title Case, axis labels.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

docker/telemetry/grafana/dashboards/xrpld-fee-market.json

@@ -303,6 +303,78 @@
         },
         "overrides": []
       }
+    },
+    {
+      "title": "Load Factor Attribution (Stacked Components)",
+      "description": "Stacked contribution of each load-factor component (fee escalation, queue, local, net, cluster) to the effective transaction cost. Shows WHICH component is driving the fee at any moment, which the aggregate load_factor hides.",
+      "type": "timeseries",
+      "gridPos": {
+        "h": 8,
+        "w": 24,
+        "x": 0,
+        "y": 24
+      },
+      "options": {
+        "tooltip": {
+          "mode": "multi",
+          "sort": "desc"
+        }
+      },
+      "targets": [
+        {
+          "datasource": {
+            "type": "prometheus"
+          },
+          "expr": "xrpld_load_factor_metrics{metric=\"load_factor_fee_escalation\",exported_instance=~\"$node\"}",
+          "legendFormat": "Fee Escalation [{{exported_instance}}]"
+        },
+        {
+          "datasource": {
+            "type": "prometheus"
+          },
+          "expr": "xrpld_load_factor_metrics{metric=\"load_factor_fee_queue\",exported_instance=~\"$node\"}",
+          "legendFormat": "Fee Queue [{{exported_instance}}]"
+        },
+        {
+          "datasource": {
+            "type": "prometheus"
+          },
+          "expr": "xrpld_load_factor_metrics{metric=\"load_factor_local\",exported_instance=~\"$node\"}",
+          "legendFormat": "Local [{{exported_instance}}]"
+        },
+        {
+          "datasource": {
+            "type": "prometheus"
+          },
+          "expr": "xrpld_load_factor_metrics{metric=\"load_factor_net\",exported_instance=~\"$node\"}",
+          "legendFormat": "Net [{{exported_instance}}]"
+        },
+        {
+          "datasource": {
+            "type": "prometheus"
+          },
+          "expr": "xrpld_load_factor_metrics{metric=\"load_factor_cluster\",exported_instance=~\"$node\"}",
+          "legendFormat": "Cluster [{{exported_instance}}]"
+        }
+      ],
+      "fieldConfig": {
+        "defaults": {
+          "unit": "none",
+          "custom": {
+            "axisLabel": "Load Factor Multiplier",
+            "spanNulls": true,
+            "insertNulls": false,
+            "showPoints": "auto",
+            "pointSize": 3,
+            "stacking": {
+              "mode": "normal",
+              "group": "A"
+            },
+            "fillOpacity": 30
+          }
+        },
+        "overrides": []
+      }
     }
   ],
   "schemaVersion": 39,

docker/telemetry/grafana/dashboards/xrpld-validator-health.json

@@ -816,6 +816,103 @@
         },
         "overrides": []
       }
+    },
+    {
+      "title": "Agreement % (7d)",
+      "description": "Validation agreement percentage over the trailing 7 days \u2014 the long-term reliability window used by external validator dashboards. Complements the 1h/24h stats.",
+      "type": "stat",
+      "gridPos": {
+        "h": 8,
+        "w": 12,
+        "x": 0,
+        "y": 43
+      },
+      "options": {
+        "tooltip": {
+          "mode": "multi",
+          "sort": "desc"
+        }
+      },
+      "targets": [
+        {
+          "datasource": {
+            "type": "prometheus"
+          },
+          "expr": "xrpld_validation_agreement{metric=\"agreement_pct_7d\",exported_instance=~\"$node\"}",
+          "legendFormat": "Agreement 7d [{{exported_instance}}]"
+        }
+      ],
+      "fieldConfig": {
+        "defaults": {
+          "unit": "percent",
+          "min": 0,
+          "max": 100,
+          "thresholds": {
+            "steps": [
+              {
+                "color": "red",
+                "value": null
+              },
+              {
+                "color": "yellow",
+                "value": 80
+              },
+              {
+                "color": "green",
+                "value": 95
+              }
+            ]
+          },
+          "custom": {}
+        },
+        "overrides": []
+      }
+    },
+    {
+      "title": "Agreements vs Missed (7d)",
+      "description": "Agreed vs missed validation counts over the trailing 7 days. A rising missed trend signals sustained validator unreliability.",
+      "type": "timeseries",
+      "gridPos": {
+        "h": 8,
+        "w": 12,
+        "x": 12,
+        "y": 43
+      },
+      "options": {
+        "tooltip": {
+          "mode": "multi",
+          "sort": "desc"
+        }
+      },
+      "targets": [
+        {
+          "datasource": {
+            "type": "prometheus"
+          },
+          "expr": "xrpld_validation_agreement{metric=\"agreements_7d\",exported_instance=~\"$node\"}",
+          "legendFormat": "Agreements 7d [{{exported_instance}}]"
+        },
+        {
+          "datasource": {
+            "type": "prometheus"
+          },
+          "expr": "xrpld_validation_agreement{metric=\"missed_7d\",exported_instance=~\"$node\"}",
+          "legendFormat": "Missed 7d [{{exported_instance}}]"
+        }
+      ],
+      "fieldConfig": {
+        "defaults": {
+          "unit": "none",
+          "custom": {
+            "axisLabel": "Count",
+            "spanNulls": true,
+            "insertNulls": false,
+            "showPoints": "auto",
+            "pointSize": 3
+          }
+        },
+        "overrides": []
+      }
     }
   ],
   "schemaVersion": 39,