stats: send amount of stars as stats

pkg/metrics/metrics.go

@@ -379,6 +379,7 @@ func sendUsageStats() {
 	metrics["stats.alerts.count"] = statsQuery.Result.Alerts
 	metrics["stats.active_users.count"] = statsQuery.Result.ActiveUsers
 	metrics["stats.datasources.count"] = statsQuery.Result.Datasources
+	metrics["stats.stars.count"] = statsQuery.Result.Stars
 
 	dsStats := models.GetDataSourceStatsQuery{}
 	if err := bus.Dispatch(&dsStats); err != nil {

pkg/models/stats.go

@@ -8,6 +8,7 @@ type SystemStats struct {
 	Orgs        int64
 	Playlists   int64
 	Alerts      int64
+	Stars       int64
 }
 
 type DataSourceStats struct {

pkg/services/sqlstore/stats.go

@@ -45,6 +45,9 @@ func GetSystemStats(query *m.GetSystemStatsQuery) error {
 		FROM ` + dialect.Quote("data_source") + `
 	  ) AS datasources,
 	  (
+		SELECT COUNT(*) FROM ` + dialect.Quote("star") + `
+	  ) AS stars,
+	  (
 		SELECT COUNT(*)
 		FROM ` + dialect.Quote("playlist") + `
 	  ) AS playlists,