Is your feature request related to a problem? Please describe.

Simple use case:

let task = Task {
    for try await result in openAI.chatsStream(query: query) {
        print(result)
    }
}

During the streaming, if I cancel the task manually (e.g. The stop generation button in the official ChatGPT app), I expect the stream to be stopped.

task.cancel() // Expecting the network connection to be cancelled too.

Unexpectedly, by monitoring the network activity, the generation does not stop even if the task has been cancelled.

This is due to (by my poor understanding) the underlying StreamingSession does not stop alongside with the task accordingly.

// func performStreamingRequest<ResultType: Codable>(request: any URLRequestBuildable, onResult: @escaping (Result<ResultType, Error>) -> Void, completion: ((Error?) -> Void)?)
let session = StreamingSession<ResultType>(urlRequest: request)
// ...
session.perform() // Once initialized never stopped

Describe the solution you'd like
Use the onTermination method to handle cancellation from the outside task.

This pull request might also help

Describe alternatives you've considered
Empty

Additional context
Empty