Notifications: Populate IncludeDescendants on ContentPublishedNotification when publishing branch

[AndyButland]

Prerequisites

• I have added steps to test this contribution in the description below

Resolves: #20575

Description

This looks a fairly straightforward oversight and fix - we have IncludeDescendants on ContentPublishedNotification but aren't currently populating it when publishing a branch as the wrong constructor is being called.

Testing

Can use the following notification handler and composer for testing.

using Umbraco.Cms.Core.Events;
using Umbraco.Cms.Core.Notifications;

namespace Umbraco.Cms.Web.UI.Custom;

internal class MyContentPublishedNotificationHandler : INotificationAsyncHandler<ContentPublishedNotification>
{
    private readonly ILogger<MyContentPublishedNotificationHandler> _logger;

    public MyContentPublishedNotificationHandler(ILogger<MyContentPublishedNotificationHandler> logger) => _logger = logger;

    public Task HandleAsync(ContentPublishedNotification notification, CancellationToken cancellationToken)
    {
        _logger.LogInformation($"PublishWithDescendants: {notification.IncludeDescendants}");
        return Task.CompletedTask;
    }
}

using Umbraco.Cms.Core.Composing;
using Umbraco.Cms.Core.Notifications;

namespace Umbraco.Cms.Web.UI.Custom;

public class TestComposer : IComposer
{
    public void Compose(IUmbracoBuilder builder)
    {
        builder.AddNotificationAsyncHandler<ContentPublishedNotification, MyContentPublishedNotificationHandler>();
    }
}

[Copilot]

Pull Request Overview

This PR fixes a bug where the IncludeDescendants property on ContentPublishedNotification was not being populated when publishing a content branch. The fix ensures that the notification correctly indicates when descendants are being published as part of a branch publish operation.

Key Changes:

• Updated the ContentPublishedNotification constructor call in SaveAndPublishBranch to pass true for the IncludeDescendants parameter

[Migaroez]

Can't think of any sideffects. Good to go 👍