Parent's risk score is 0, however there are childs with scores

### Current Behavior

We got a problem recently that we create a parent project and child projects under this parent. The thing is child is showing risk score etc. But parent project itself not showing anything, shows 0. However under this project there are 10 childs with different scores. How to show a summary of these scores in parent itself?

### Steps to Reproduce

1.Somehow we should get a sum of all childs in parent projects

### Expected Behavior

Parent shows 0 no matter what

### Dependency-Track Version

4.11.7

### Dependency-Track Distribution

Container Image

### Database Server

PostgreSQL

### Database Server Version

16

### Browser

N/A

### Checklist

- [X] I have read and understand the [contributing guidelines](https://github.com/DependencyTrack/dependency-track/blob/master/CONTRIBUTING.md#filing-issues)
- [X] I have checked the [existing issues](https://github.com/DependencyTrack/dependency-track/issues) for whether this defect was already reported