fix(telemetry): add missing counters, fix dashboard metric name, clean dead code

- Add rippled_validation_agreements_total and rippled_validation_missed_total
  counter declarations and creation (wiring to ValidationTracker pending rebase)
- Fix peer-quality dashboard: query rippled_server_info{metric="peer_disconnects_resources"}
  instead of non-existent rippled_Overlay_Peer_Disconnects_Charges
- Remove dead getCountsJson() call in storageDetail callback

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

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

@@ -250,7 +250,7 @@
           "datasource": {
             "type": "prometheus"
           },
-          "expr": "rippled_Overlay_Peer_Disconnects_Charges{exported_instance=~\"$node\"}",
+          "expr": "rippled_server_info{metric=\"peer_disconnects_resources\",exported_instance=~\"$node\"}",
           "legendFormat": "Disconnects [{{exported_instance}}]"
         }
       ],

src/xrpld/telemetry/MetricsRegistry.cpp

@@ -148,6 +148,10 @@ MetricsRegistry::start(std::string const& endpoint, std::string const& instanceI
         meter_->CreateUInt64Counter("rippled_state_changes_total", "Total operating mode changes");
     jqTransOverflowCounter_ = meter_->CreateUInt64Counter(
         "rippled_jq_trans_overflow_total", "Total job queue transaction overflows");
+    validationAgreementsCounter_ = meter_->CreateUInt64Counter(
+        "rippled_validation_agreements_total", "Total validation agreements");
+    validationMissedCounter_ =
+        meter_->CreateUInt64Counter("rippled_validation_missed_total", "Total validation misses");
 
     // Register all observable (async) gauges.
     registerAsyncGauges();
@@ -951,10 +955,6 @@ MetricsRegistry::registerAsyncGauges()
 
             try
             {
-                // Use getCountsJson which includes backend-reported sizes.
-                Json::Value obj(Json::objectValue);
-                app.getNodeStore().getCountsJson(obj);
-
                 auto observe = [&](char const* name, int64_t value) {
                     opentelemetry::nostd::get<opentelemetry::nostd::shared_ptr<
                         opentelemetry::metrics::ObserverResultT<int64_t>>>(result)

src/xrpld/telemetry/MetricsRegistry.h

@@ -372,6 +372,13 @@ private:
     /// Counter: rippled_jq_trans_overflow_total — incremented on job queue transaction overflows.
     opentelemetry::nostd::unique_ptr<opentelemetry::metrics::Counter<uint64_t>>
         jqTransOverflowCounter_;
+    /// Counter: rippled_validation_agreements_total — incremented by ValidationTracker on
+    /// agreement.
+    opentelemetry::nostd::unique_ptr<opentelemetry::metrics::Counter<uint64_t>>
+        validationAgreementsCounter_;
+    /// Counter: rippled_validation_missed_total — incremented by ValidationTracker on miss.
+    opentelemetry::nostd::unique_ptr<opentelemetry::metrics::Counter<uint64_t>>
+        validationMissedCounter_;
 
     /** Register all observable gauge callbacks with the OTel SDK.
         Called once during start().