Clean up NFT minting workflows in storage backend and bubble

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Refactor NFT minting workflows to the new architecture.

┆Issue is synchronized with this Asana task by Unito
┆Created By: PJ

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➤ Bofu Chen commented:

PJ Can you share a summary before EOD considering the sprint due is coming? Thanks!

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➤ PJ commented:

Bofu Chen This can be done today

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➤ Tammy Yang commented:

PJ has this been closed?

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➤ PJ commented:

Tammy Yang This is done