feature request: include request id in error result

[jb-delightai]

Using the realtime client, our onResult handler can currently use the request_id parameter to identify the request corresponding to an api call, if that call is successful. However, since the onResult callback is typed as @escaping (Result<Output, Error>) -> Void, we can't identify requests for api call failures in the same way.

Some example code demonstrating the issue:

connection = try! falClient.realtime.connect(
    to: OptimizedLatentConsistency,
    connectionKey: "ReproDemo",
    throttleInterval: .milliseconds(0), // no need to throttle since i'm calling generate in response to a button tap
    onResult: { (result: Result<LcmResponse, Error>) in
        switch result {
        case .success(let data):
            // Can do things with data.requestId here
            print(data.requestId!)
        case .failure(let error):
            // ISSUE: Can't tie this back to the originating request, since there's no way to access request_id
            print(error)
        }
    }
)

[drochetti]

Thanks for bringing this up @jb-delightai. You're absolutely right, we need to add the request id to the errors. I'll work on it and let you know once it's fixed.