Implement the AutoCredit contract (D flow)

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Implement the AutdoCredit contract part of the D flow. See https://www.notion.so/Bridging-architecture-1addfc9427de8017a66ec52cf666e75a?pvs=4#1addfc9427de805c85cdcc31fc6f0a1d

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Depends on https://github.com/recallnet/recall-deploy/issues/258