Add FileLu cloud storage backend

backend/filelu/utils.go

@@ -0,0 +1,15 @@
+package filelu
+
+import (
+	"fmt"
+)
+
+// parseStorageToBytes converts a storage string (e.g., "10") to bytes
+func parseStorageToBytes(storage string) (int64, error) {
+	var gb float64
+	_, err := fmt.Sscanf(storage, "%f", &gb)
+	if err != nil {
+		return 0, fmt.Errorf("failed to parse storage: %w", err)
+	}
+	return int64(gb * 1024 * 1024 * 1024), nil
+}