[PHP] Netbeans may also check inside used traits to determine if a property is used

### Apache NetBeans version

Apache NetBeans 16

### What happened

private promoted property marked as unused

### How to reproduce

```php
Service->execute();
}

}

```
In this case, `$Service` is marked as unused inside `myClass` class

### Did this work correctly in an earlier version?

No / Don't know

### Operating System

ubuntu 22.04

### JDK

OpenJDK Runtime Environment (build 17.0.5+8-Ubuntu-2ubuntu122.04) OpenJDK 64-Bit Server VM (build 17.0.5+8-Ubuntu-2ubuntu122.04, mixed mode, sharing)

### Apache NetBeans packaging

Apache NetBeans provided installer

### Anything else

_No response_

### Are you willing to submit a pull request?

No

### Code of Conduct

Yes

Start with the PHP inspection responsible for marking promoted properties unused and reproduce the report with the myClass/myTrait examples in the issue. Trace how trait members are considered, then verify that $Service is recognized as used through the trait and that the false warning no longer appears.

Written by the indexing model from the issue text.