DecalRegistry.AddPropertyHandler not adding the property

### My mods and Everest install are up to date

Yes

### I have recreated the bug with only Everest OR a minimum number of mods enabled

Yes

### Describe the bug

I am attempting to create a custom Decal Registry property, however the delegate is not running no matter what I do. I have asked basically everywhere i could think of but nobody who has tried to help has been able to figure out the problem.

Unsure if this is an issue with Everest or my skill.

### Steps to reproduce

`Load() function`
```cs
public override void Load() {
//Logger.Log(LogLevel.Info, "ReactiveRange", "Hooked Decal.Update");
On.Celeste.Decal.Update += updateReactiveRange;
DecalRegistry.AddPropertyHandler("ReactiveDecals_Pulse", delegate(Decal decal, System.Xml.XmlAttributeCollection attrs)
{
Logger.Log("ReactiveDecals", "pleaseworkpleaseworkpleasework"); // this doesn't print to the log.txt
});
}
```

`DecalRegistry.xml`
```xml

```

### Expected behavior

If I understand it properly, when I add the `ReactiveDecals_Pulse` property to a decal, it should run the delegate, and print `pleaseworkpleaseworkpleasework` to the log.txt.

### Operating System

EndeavourOS

### Everest Version

4465

### Mods required to reproduce

_No response_

### Additional context

[log.txt](https://github.com/EverestAPI/Everest/files/13756888/log.txt)