refactor(backend): refactoring management of go routines in backend

pkg/models/dashboard_snapshot.go

@@ -63,6 +63,9 @@ type DeleteDashboardSnapshotCommand struct {
 	DeleteKey string `json:"-"`
 }
 
+type DeleteExpiredSnapshotsCommand struct {
+}
+
 type GetDashboardSnapshotQuery struct {
 	Key string
 

pkg/models/timer.go

@@ -1,7 +0,0 @@
-package models
-
-import "time"
-
-type HourCommand struct {
-	Time time.Time
-}