/// Parse a value that may be [int], [num], or [String] to [int].
/// Used as `@JsonKey(fromJson: flexibleInt)` and in manual `fromJson` factories
/// to handle Plex API responses where numeric fields may arrive as strings
/// (XML-to-JSON conversion).
int? flexibleInt(Object? v) => switch (v) {
      num n => n.toInt(),
      String s => int.tryParse(s),
      _ => null,
    };