03-integrations- [Bug] - pydantic agent throwing "You must provide a region_name.." during initialization.

**Please list the sample in which the bug is present.**

```
03-integrations/pydantic-agents
```

If you are reporting multiple bugs, please create a separate issue for each. For documentation improvements, use the documentation improvement issue type.

**Bug Description**
A clear and concise description of the bug.

```
The pydantic-agents sample is throwing the exception below when testing locally via a docker container.
```

**Screenshots**
If applicable, add screenshots to help explain your problem.

```
Please provide screenshots here.
```