Apply "Preserve" also to properties

This constructor may not be ideal, but is perfectly valid:

public readonly int $someCount;

public function __construct(
	public readonly array $someArray,
) {
	$someCount = 0;
	foreach ($this->someArray as $someItem) {
		// some logic which adds to $someCount
	}
	$this->someCount = $someCount;
}

Of course, with constructorWithPromotedProperties() this is not possible. However, if I #[Preserve] the constructor, the $someCount definition is lost.

#[Preserve] attribute has a potential to be used to more than methods. I suggest to apply it on properties as well.