- previously, each orch account was given the contracts storage node. this creates a child node per account
- refs #9066, helping ensure orch account addresses are available for smart-wallet clients. left some suggestions in code comments for further improvements

- update PublicTopic.storagePath on async-flow endowments to return a string instead of a promise. Uses asVow with async function since it's reasonable to assume the remote call will resolve promptly (in the same run)
- update asContinuingOffer to return a vow and unwrap the result of getPublicTopic since this is also a vow. same promptness considerations mentioned above apply
- closes: #9673

- seem like it was missed in #9664, but not caught since this job runs after merges to master

- tests a contract that uses orchestrate/async-flow in the multichain-testing environment

- fixes changed parameter from #9662
- improves test to print delegate offer result error on failure