Alerting: Store instance annotations in alert rule state (#114975)

Alerting: Store annotations in alert instance state

pkg/services/sqlstore/migrations/migrations.go

@@ -163,5 +163,7 @@ func (oss *OSSMigrations) AddMigration(mg *Migrator) {
 
 	ualert.AddAlertRuleGroupIndexMigration(mg)
 
+	ualert.AddStateAnnotationsColumn(mg)
+
 	ualert.CollateBinAlertRuleGroup(mg)
 }

pkg/services/sqlstore/migrations/ualert/state_annotations_mig.go

@@ -0,0 +1,12 @@
+package ualert
+
+import "github.com/grafana/grafana/pkg/services/sqlstore/migrator"
+
+// AddStateAnnotationsColumn adds annotations column to alert_instance
+func AddStateAnnotationsColumn(mg *migrator.Migrator) {
+	mg.AddMigration("add annotations column to alert_instance table", migrator.NewAddColumnMigration(migrator.Table{Name: "alert_instance"}, &migrator.Column{
+		Name:     "annotations",
+		Type:     migrator.DB_Text,
+		Nullable: true,
+	}))
+}