Workflow Checkpointing Proposal

[WhitWaldo]

On the maintainers' call on 3/24/25, @JoshVanL proposed an idea he'd been thinking about regarding resuscitating workflows that were in a terminal state and shared some background around the origins of the idea. While thinking about what this might look like, it occurred to me that there was potentially a simpler approach that accommodated the same conclusion, but which might fit better in the existing Dapr Workflows paradigm, so I've typed this up to get broader feedback.

[olitomlinson]

I strongly recommend that you sync up with @cgillum as he has extremely valuable prior art here with the Rewind API in Azure Durable Functions, which never made it to GA because of challenges.

Personally, I would like to see this solved at the DurableTask level and I would also like to see the proposal considered along side versioning and patching (similar to Temporals approach) to see which has the most immediate and impactful value to customers / bang-for-engineering-buck

[jjcollinge]

I strongly recommend that you sync up with @cgillum as he has extremely valuable prior art here with the Rewind API in Azure Durable Functions, which never made it to GA because of challenges.

Personally, I would like to see this solved at the DurableTask level and I would also like to see the proposal considered along side versioning and patching (similar to Temporals approach) to see which has the most immediate and impactful value to customers / bang-for-engineering-buck

Linking Azure/azure-functions-durable-extension#1828

[WhitWaldo]

As we're moving forward with #80 instead, I submit that this proposal is no longer necessary.