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Email is gmail.
It would produce an execution receipt for the computation and seems like something that might be nice to standardize. I know container engines like podman save exit code and logs in a local database, but not outputs. Would also want to capture some info about the execution environment like provider, machine type/stats, etc.
Maybe the saving part could be a poststop hook? Not sure on output format; some things would be small and could be inline with the receipt, others could be a few large files going to individual objects, others a tar/squash of a whole dir from the container.