OpenTSDB: Move health check to the backend (#114082)

* add feature toggle

* move health check to backend

* add tests

pkg/services/featuremgmt/registry.go

@@ -1961,6 +1961,14 @@ var (
 			FrontendOnly: true,
 			Owner:        grafanaDataProSquad,
 		},
+		{
+			Name:            "opentsdbBackendMigration",
+			Description:     "Run queries through the data source backend",
+			Stage:           FeatureStageGeneralAvailability,
+			Owner:           grafanaOSSBigTent,
+			Expression:      "false",
+			RequiresRestart: true,
+		},
 		{
 			Name:         "ttlPluginInstanceManager",
 			Description:  "Enable TTL plugin instance manager",

pkg/services/featuremgmt/toggles_gen.csv

@@ -266,6 +266,7 @@ panelTimeSettings,experimental,@grafana/dashboards-squad,false,false,false
 kubernetesAnnotations,experimental,@grafana/grafana-backend-services-squad,false,false,false
 awsDatasourcesHttpProxy,experimental,@grafana/aws-datasources,false,false,false
 transformationsEmptyPlaceholder,preview,@grafana/datapro,false,false,true
+opentsdbBackendMigration,GA,@grafana/oss-big-tent,false,true,false
 ttlPluginInstanceManager,experimental,@grafana/plugins-platform-backend,false,false,true
 lokiQueryLimitsContext,experimental,@grafana/observability-logs,false,false,true
 rudderstackUpgrade,experimental,@grafana/grafana-frontend-platform,false,false,true

pkg/services/featuremgmt/toggles_gen.go

@@ -762,6 +762,10 @@ const (
 	// Enables http proxy settings for aws datasources
 	FlagAwsDatasourcesHttpProxy = "awsDatasourcesHttpProxy"
 
+	// FlagOpentsdbBackendMigration
+	// Run queries through the data source backend
+	FlagOpentsdbBackendMigration = "opentsdbBackendMigration"
+
 	// FlagKubernetesAlertingHistorian
 	// Adds support for Kubernetes alerting historian APIs
 	FlagKubernetesAlertingHistorian = "kubernetesAlertingHistorian"

pkg/services/featuremgmt/toggles_gen.json

@@ -2499,6 +2499,20 @@
         "expression": "true"
       }
     },
+    {
+      "metadata": {
+        "name": "opentsdbBackendMigration",
+        "resourceVersion": "1763456634837",
+        "creationTimestamp": "2025-11-18T09:03:54Z"
+      },
+      "spec": {
+        "description": "Run queries through the data source backend",
+        "stage": "GA",
+        "codeowner": "@grafana/oss-big-tent",
+        "requiresRestart": true,
+        "expression": "false"
+      }
+    },
     {
       "metadata": {
         "name": "otelLogsFormatting",