SimpleIvrBot - CallId not available in Call Object on Established notification so 'PlayPromptOperation' fails

Describe the issue
The 'PlayPromptOperation' generates the following error due to the 'callId' being null in Call object (args.ResourceData).

{"Code: UnknownError\r\nMessage: {\"message\":\"No HTTP resource was found that matches the request URI 'https://pma.plat.skype.com/newPlatform/v1/communications/calls('microsoft.graph.playPrompt')'.\"}\r\nAdditionalData:\r\n\tinnerError: {\"date\":\"2023-01-04T14:18:00\",\"request-id\":\"ec5251bf-a346-4374-821c-f7c46c403906\",\"client-request-id\":\"02164f14-eace-464c-bcb5-421ccfe421b2\"}\r\n"}

Code Snippet
Download the lastest version of 'microsoft-graph-comms-samples-master'
Change the Target Framework to be 'net6.0'
Modify the (Bot.cs constructor) with the code below to correct serialization problem as per (https://github.com/microsoftgraph/microsoft-graph-comms-samples/issues/508)

// graph client
var productInfo = new ProductInfoHeaderValue(
    typeof(Bot).Assembly.GetName().Name,
    typeof(Bot).Assembly.GetName().Version.ToString());

JsonSerializerOptions jsonSerializerOptions = new();
jsonSerializerOptions.Converters.Add(new JsonStringEnumConverter(JsonNamingPolicy.CamelCase, false));

GraphApiClient = new GraphAuthClient(
    GraphLogger,
    jsonSerializerOptions, // replaced Serializer.JsonSerializerSettings,
    new HttpClient(),
    AuthenticationProvider,
    productInfo,
    defaultProperties);

Modify 'ProcessNotificationAsync' in Bot.cs to use 'HttpResponseMessage' and replace 'httpRequest.CreateResponse'.

 //var httpResponse = httpRequest.CreateResponse(HttpStatusCode.Forbidden);
var httpResponse = new HttpResponseMessage(HttpStatusCode.Forbidden);
await httpResponse.CreateHttpResponseAsync(response).ConfigureAwait(false);

Expected behavior
The CallId should not be null and the phrase should successfully play. This worked when using older versions of the packages (1.2.0.850).

Graph SDK (please complete the following information):

• Graph-dotnet-2.0.5
• Package Versions: 1.2.0.3742

Start in Bot.cs, reviewing the Bot constructor and ProcessNotificationAsync changes described in the report, then compare the serialization guidance from issue 508 and the listed Graph SDK/package versions. Done means the Established notification provides a non-null CallId and PlayPromptOperation successfully plays the phrase.