Task lists produce annotations with None

```
tasks = client.tasks.list(project="1")

for task in tasks:
print( task.data['username'] )
print( task.annotations )
```

when running this code, task.annotations is printed as `None`, but with the following workaround I am able to get the annotations:

```
tasks = client.tasks.list(project="1")

for task in tasks:
print( task.data['username'] )
annotations = client._client_wrapper.httpx_client.request(f"api/tasks/{task.id}/annotations/", method="GET").json()
print( annotations )
```

Looking at the code, most likely I should have defined `fields = "all"` on the `client.tasks.list` for them not to be `None`, but this is not the specified [in short the documentation](https://github.com/HumanSignal/label-studio-sdk?tab=readme-ov-file#get-tasks-with-annotations-and-predictions). If I could choose, I would instead change the default of `client.tasks.list` as `fields ="all"` to simplify the API use.