How can I get strong-typed history of a workflow execution?

I'm trying to build a UI to audit the status of in-progress and completed workflows. I'd like to display the full history of the workflow.

I see that `TaskHubClient` has a method `GetOrchestrationHistoryAsync` that is nearly what I want, except it returns a json string instead of a strong-typed list of history items:

https://github.com/Azure/durabletask/blob/657586bcfe9b0c68695ec6447ee9baca338c6cf7/src/DurableTask.Core/TaskHubClient.cs#L832-L849

Digging down through the call stack, `IOrchestrationServiceClient.GetOrchestrationHistoryAsync` also returns json:

https://github.com/Azure/durabletask/blob/657586bcfe9b0c68695ec6447ee9baca338c6cf7/src/DurableTask.AzureStorage/AzureStorageOrchestrationService.cs#L1749-L1762

The next level down (at least in the case of the Azure Storage backend) is `ITrackingStore`, which is unusable to me because it's not public.

https://github.com/Azure/durabletask/blob/657586bcfe9b0c68695ec6447ee9baca338c6cf7/src/DurableTask.AzureStorage/Tracking/ITrackingStore.cs#L26

I'm currently working around the issue by deserializing the returned json. It works, but the code needed to do so is nontrivial and brittle because `HistoryEvent` is an abstract class and requires custom type mapping to deserialize properly.

It seems like there should be a "Get Orchestration History" method that returns a list of `HistoryEvent` objects, or perhaps an `OrchestrationHistory` object. Am I missing something?