Adds details on SignalR server events

[AndyButland]

📋 Description

Adds details on SignalR server events

📎 Related Issues (if applicable)

Relates to PR: umbraco/Umbraco-CMS#17776

✅ Contributor Checklist

I've followed the Umbraco Documentation Style Guide and can confirm that:

• Code blocks are correctly formatted.
• Sentences are short and clear (preferably under 25 words).
• Passive voice and first-person language (“we”, “I”) are avoided.
• Relevant pages are linked.
• All links work and point to the correct resources.
• Screenshots or diagrams are included if useful.
• Any code examples or instructions have been tested.
• Typos, broken links, and broken images are fixed.

Product & Version (if relevant)

CMS 15 and 16

Deadline (if relevant)

Any time.

Please note that updates should be copied to the 15 section once approved.

[nikolajlauridsen]

Looks great to me 🤩👍

[sofietoft]

Changes looks good to me.

I am wondering though, if this article is placed in the correct section.
Isn't Customizing primarily for working specifically with the Backoffice UI?
Might this be a better fit in the Extending section, which is about extending the existing Umbraco features - be it frontend of backend 🤔

[AndyButland]

Yes, I wondered about that too. But I put it here as these events would be something you consume in the backoffice - i.e. they are messages from the server to the client. The article is all about how you generate them, but you'll only do this to use them in the backoffice. I also suspect the article will be extended in future with a bit more about how you'd use them in the backoffice. It's not there now as they aren't actually being used yet in core.

[sofietoft]

Alright! 🤔 But, this is still not related to UI customizations, is it? Because that is what the Customization section is for.

The Extending section holds information about health checks, backoffice search, etc, which are all "backend" material related to the Umbraco Backoffice 🤔 and to me, this is what this looks like as well 😅 Migth be wrong of course, I'm just going on instinct here.

So, unless these extensions to the article you're mentioning will be UI extensions, I do believe this is a better fit for the Extending section 🤔

[AndyButland]

OK, I've moved it into the "Extending" section.