Fix insert() and update() ignoring typed public properties

[enlivenapp]

I created a subclass with typed properties and attempted an insert:

class User extends \flight\ActiveRecord {
    public function __construct($pdo = null) {
        parent::__construct($pdo, 'users');
    }
    public int $id;
    public string $name;
}

$user = new User($pdo);
$user->name = 'John';
$user->insert();

I expected a new row to be inserted into the database.

Instead, nothing is inserted — the method returns early because $dirty is empty.

The same issue affects update() after find():

$user = new User($pdo);
$user->eq('id', 1)->find();
$user->name = 'Updated';
$user->save();

I expected the name to be updated to "Updated". Instead, no update is issued.

Subclasses without typed properties are not affected.

Tests included. All existing tests continue to pass.

[n0nag0n]

Thanks for this! I just have used comment attributes in the past (when using Runway to generate a record for example), but this works too.