refactor(telemetry): default the $service_name dashboard filter to 'xrpld'

Completes the default change applied on phase-6-statsd and
phase-7-native-metrics. The four dashboards introduced on phase-9
(validator-health, peer-quality, fee-market, job-queue) now also
pre-select 'xrpld' rather than 'All' for the service_name filter.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

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

@@ -472,8 +472,8 @@
         "includeAll": true,
         "allValue": ".*",
         "current": {
-          "text": "All",
-          "value": "$__all"
+          "text": "xrpld",
+          "value": "xrpld"
         },
         "multi": true,
         "refresh": 2,

docker/telemetry/grafana/dashboards/job-queue.json

@@ -470,8 +470,8 @@
         "includeAll": true,
         "allValue": ".*",
         "current": {
-          "text": "All",
-          "value": "$__all"
+          "text": "xrpld",
+          "value": "xrpld"
         },
         "multi": true,
         "refresh": 2,

docker/telemetry/grafana/dashboards/peer-quality.json

@@ -379,8 +379,8 @@
         "includeAll": true,
         "allValue": ".*",
         "current": {
-          "text": "All",
-          "value": "$__all"
+          "text": "xrpld",
+          "value": "xrpld"
         },
         "multi": true,
         "refresh": 2,

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

@@ -932,8 +932,8 @@
         "includeAll": true,
         "allValue": ".*",
         "current": {
-          "text": "All",
-          "value": "$__all"
+          "text": "xrpld",
+          "value": "xrpld"
         },
         "multi": true,
         "refresh": 2,