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
authentication.credentials from both push_notification_config and
reporting_webhook) 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, andauthentication.credentialsfrom bothpush_notification_configandreporting_webhook) before hashing with RFC 8785 JCS + SHA-256.