Isolate runner object store construction

internal/app/object_store.go

@@ -13,7 +13,15 @@ func newCommandObjectStore(ctx context.Context, cfg *config.Config, logger *slog
 	if _, err := loadSecretsFromConfig(cfg, logger); err != nil {
 		return nil, fmt.Errorf("load secrets from files: %w", err)
 	}
-	store, err := newObjectStoreFromConfigFn(ctx, cfg)
+	return initializeObjectStoreBackend(ctx, cfg, newObjectStoreFromConfigFn)
+}
+
+func initializeObjectStoreBackend(
+	ctx context.Context,
+	cfg *config.Config,
+	factory func(context.Context, *config.Config) (storage.ObjectStore, error),
+) (storage.ObjectStore, error) {
+	store, err := factory(ctx, cfg)
 	if err != nil {
 		return nil, fmt.Errorf("initialize object store backend: %w", err)
 	}