Chore: Start annotations app (#113018)

* annotation legacy store with api server, read only

* Add a feature flag for annotations app

* implement list filters

* annotations are not addressable by ID for read operations

* fix registry apps test

* add ownership for an app

* disable linter

* typo, of course

* fix go workspace

* update workspace

* copy annotation app in dockerfile

* update workspace

---------

Co-authored-by: Tania B. <10127682+undef1nd@users.noreply.github.com>

pkg/services/annotations/annotationsimpl/xorm_store.go

@@ -330,7 +330,9 @@ func (r *xormRepositoryImpl) Get(ctx context.Context, query annotations.ItemQuer
 			params = append(params, query.AnnotationID)
 		}
 
-		if query.AlertID != 0 {
+		if query.AlertID < 0 {
+			sql.WriteString(` AND a.alert_id = 0`)
+		} else if query.AlertID > 0 {
 			sql.WriteString(` AND a.alert_id = ?`)
 			params = append(params, query.AlertID)
 		} else if query.AlertUID != "" {

pkg/services/featuremgmt/registry.go

@@ -2159,6 +2159,13 @@ var (
 			Owner:        grafanaSharingSquad,
 			FrontendOnly: false,
 		},
+		{
+			Name:        "kubernetesAnnotations",
+			Description: "Enables app platform API for annotations",
+			Stage:       FeatureStageExperimental,
+			Owner:       grafanaBackendServicesSquad,
+			Expression:  "false",
+		},
 	}
 )
 

pkg/services/featuremgmt/toggles_gen.csv

@@ -277,3 +277,4 @@ pluginStoreServiceLoading,experimental,@grafana/plugins-platform-backend,false,f
 onlyStoreActionSets,GA,@grafana/identity-access-team,false,false,false
 panelTimeSettings,experimental,@grafana/dashboards-squad,false,false,false
 dashboardTemplates,experimental,@grafana/sharing-squad,false,false,false
+kubernetesAnnotations,experimental,@grafana/grafana-backend-services-squad,false,false,false

pkg/services/featuremgmt/toggles_gen.go

@@ -1117,4 +1117,8 @@ const (
 	// FlagDashboardTemplates
 	// Enable template dashboards
 	FlagDashboardTemplates = "dashboardTemplates"
+
+	// FlagKubernetesAnnotations
+	// Enables app platform API for annotations
+	FlagKubernetesAnnotations = "kubernetesAnnotations"
 )

pkg/services/featuremgmt/toggles_gen.json

@@ -2153,6 +2153,19 @@
         "requiresRestart": true
       }
     },
+    {
+      "metadata": {
+        "name": "kubernetesAnnotations",
+        "resourceVersion": "1761142826172",
+        "creationTimestamp": "2025-10-22T14:20:26Z"
+      },
+      "spec": {
+        "description": "Enables app platform API for annotations",
+        "stage": "experimental",
+        "codeowner": "@grafana/grafana-backend-services-squad",
+        "expression": "false"
+      }
+    },
     {
       "metadata": {
         "name": "kubernetesAuthZHandlerRedirect",