BendDefs not accessible from Layout

### 🔍 Before submitting the issue

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

### 🐞 Description of the bug

We can't retrieve the list of BendDefinition.

### 📝 Steps to reproduce

NA

### 💻 Which operating system are you using?

Windows

### 📀 Which ANSYS version are you using?

NA

### 🐍 Which Python version are you using?

3.9

### 📦 Installed packages

```shell
NA
```

Start by reproducing the BendDefinition list access problem through the Layout API on Windows with Python 3.9, using the behavior shown in the attached screenshots. Trace how Layout exposes bend definitions and verify that the list can be retrieved; add or update a focused test if the repository contains coverage for this API.

Written by the indexing model from the issue text.