Security fixes and plugin system for the profile controller

### Checks

- [x] I have searched the [existing issues](https://github.com/kubeflow/dashboard/issues).
- [x] My issue is related to one of the components in the [`kubeflow/dashboard`](https://github.com/kubeflow/dashboard) repository.

### Kubeflow Version

master

### Kubeflow Platform

master

### Kubernetes Distribution

Kind

### Kubernetes Version

```shell
1.34
```

### Description

@andyatmiami @kimwnasptd

### Relevant Logs

```shell

```

The issue names no files, tests, or entry points and provides no actionable details beyond security fixes and a plugin system for the profile controller. Start by clarifying the affected components, required security changes, plugin behavior, and acceptance criteria; the work is done when that agreed scope is implemented and verified.

Written by the indexing model from the issue text.