`test_app_poster` hangs in Python 3.10-3.13

### 🔍 Before submitting the issue

- [x] I have searched among the existing issues
- [x] I am using a Python virtual environment

### 🐞 Description of the bug

`test_app_poster` hangs for Python 3.10-3.13 in the workflow

```
tests/embedding/test_app.py::test_app_poster
10.084275418000004 starting test test_app_poster - file new
10.228500386999997 change_name_async
```

### 📝 Steps to reproduce

Run `ci_cd.yml` in the Actions tab on main with 251. The embedding tests and coverage jobs hang using `ubuntu-latest` and `public-ubuntu-latest-8-cores`

### 💻 Which operating system are you using?

Linux

### 📀 Which ANSYS version are you using?

251

### 🐍 Which Python version are you using?

3.10

### 📦 Installed packages

```shell
N/A
```

Start with tests/embedding/test_app.py::test_app_poster and reproduce the hang by running ci_cd.yml on main with ANSYS 251 under the reported Python versions and Ubuntu runners. Use the logged transition through “change_name_async” to narrow the failure. Done means the test no longer hangs and the embedding tests and coverage jobs complete.

Written by the indexing model from the issue text.