bug: crash with unhandled error internal service exception

### Checks

- [x] I have searched [github.com/aws/amazon-q-developer-cli/issues](https://github.com/aws/amazon-q-developer-cli/issues?q=) and there are no duplicates of my issue
- [x] I have run `q doctor` in the affected terminal session
- [x] I have run `q restart` and replicated the issue again

### Operating system

Mac OS

### Expected behaviour

handle errors gracefully

### Actual behaviour

`Amazon Q is having trouble responding right now:
0: unhandled error (InternalServerException)
1: service error
2: unhandled error (InternalServerException)
3: Error { code: "InternalServerException", message: "Encountered an unexpected error when processing the request, please try again.", aws_request_id: "4bbec1bd-a2e6-44a1-8204-4934ccc2deb0" }

Location:
crates/chat-cli/src/cli/chat/mod.rs:887

Backtrace omitted. Run with RUST_BACKTRACE=1 environment variable to display it.
Run with RUST_BACKTRACE=full to include source snippets.`

### Steps to reproduce

_No response_

### Environment

```yaml

```