Generally Available: Durable functions v3 in Azure Functions

Durable functions extension v3 in Azure Functions is now generally available. Major improvements in this new major version include improved cost efficiency for usage of Azure Storage v2 accounts and an upgrade to the latest Azure Storage SDKs, as well as the .NET Framework used by the extension. 

Specifically, the Microsoft.Azure.WebJobs.Extensions.DurableTask v3.x package (referred to as Extensions.DurableTask from now on) is introduced, which represents a breaking change for durable functions C# apps that use the in-process model. Since the durable functions .NET isolated package, namely Microsoft.Azure.Functions.Worker.Extensions.DurableTask, references Extensions.DurableTask as its underlying assembly, the improvements mentioned above also apply to the isolated package starting from version 1.2.x. 

For non .NET apps, durable functions extension v3 will be available in the extension bundles starting from version 4.22.0. 

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