@cfxlabsinc/b2b-services
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    CachedCustomer: Omit<Customer, "createdAt" | "updatedAt"> & {
        createdAt: string;
        updatedAt: string;
    }

    Serialized projection of Customer for the L2 cache. L2 round-trips through JSON, so Date fields arrive as strings on cross-process / post-L1 reads. createdAt / updatedAt are the only Date-typed fields.