Summary: Frequently we will be operating with the blake3 key that is represented as `std::optional` so making it is easier to initialize blake3 appropriately.
Reviewed By: chadaustin
Differential Revision: D46268711
fbshipit-source-id: 2b9882683e79de2325d23353a4ca7260f3853f47
Summary:
Adding blake3 for the upcoming migration to it.
bypass-github-export-checks
Reviewed By: chadaustin
Differential Revision: D43567300
fbshipit-source-id: a0c81b42309cab65cf68be9be0530c86e0e91e95