Draft: Moved draft notes publishing to be async

What does this MR do and why?

This moves the creation of notes from draft notes to be done inside of a worker. This speeds up the publish endpoint substantially, taking a request that could take seconds to now only taking a few 100ms.

There is a UX change here in that review comments don't all get removed when the publish request finishes, we remove them once the backend has converted the draft note into the normal note.

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