There are several places in the orchestrator where we check for an invalid Z22 / Evaluation result. We are currently using Z547 / Invalid format for this error condition, but Z547 wasn't really intended for this. We should have a new error type specifically for this error condition.
Possible names might be Invalid evaluation result (especially if it's only about the Z22 format) or Invalid function response (if it covers a broader range of sins).
Completion checklist
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