Make migration an asynchronous task (#4666)

* Add failed state and error to Job
* Move migration code
* Add websocket monitor
* Make migrate a job managed task

internal/api/resolver_mutation_migrate.go

@@ -38,3 +38,16 @@ func (r *mutationResolver) MigrateBlobs(ctx context.Context, input MigrateBlobsI
 
 	return strconv.Itoa(jobID), nil
 }
+
+func (r *mutationResolver) Migrate(ctx context.Context, input manager.MigrateInput) (string, error) {
+	mgr := manager.GetInstance()
+	t := &task.MigrateJob{
+		BackupPath: input.BackupPath,
+		Config:     mgr.Config,
+		Database:   mgr.Database,
+	}
+
+	jobID := mgr.JobManager.Add(ctx, "Migrating database...", t)
+
+	return strconv.Itoa(jobID), nil
+}