Compute the canonical payload hash used for idempotency equivalence.
Strips the closed exclusion list (idempotency_key, context when
it's the echo-back object, governance_context, and
push_notification_config.authentication.credentials) before hashing
with RFC 8785 JCS + SHA-256.
Compute the canonical payload hash used for idempotency equivalence.
Strips the closed exclusion list (
idempotency_key,contextwhen it's the echo-back object,governance_context, andpush_notification_config.authentication.credentials) before hashing with RFC 8785 JCS + SHA-256.