fmtBytes function
Formats bytes as a human-readable string with one decimal place.
Used by CLI adapters that display memory sizes (e.g. fdb mem).
Implementation
String fmtBytes(int bytes) {
if (bytes >= 1024 * 1024 * 1024) return '${(bytes / (1024 * 1024 * 1024)).toStringAsFixed(1)} GB';
if (bytes >= 1024 * 1024) return '${(bytes / (1024 * 1024)).toStringAsFixed(1)} MB';
if (bytes >= 1024) return '${(bytes / 1024).toStringAsFixed(1)} KB';
return '$bytes B';
}