Title: CheckPayloadSignature and CheckPayloadSignature256 should verify multiple comma‑separated signatures
Title: CheckPayloadSignature and CheckPayloadSignature256 should verify multiple comma‑separated signatures: a task in LegoFlow-SWE (Harbor dataset). The computed HMAC hex string must still be returned regardless of success or failure, exactly as it is today.
The task
The computed HMAC hex string must still be returned **regardless** of success or failure, exactly as it is today.
Part of Lego-X/LegoFlow-SWE.