Deliver a client response/errorResponse from the peer identified by
responderToken. Returns true if it matched a pending outbound request
issued to the SAME session token. The waiter is looked up by
(responderToken, id), so a reply arriving on one session can never resolve
(or even reach) another session's waiter — closing the cross-session hijack
without a separate owner check. A waiter registered under the empty token
(stateless / shared mode) is matched only by a reply that likewise carries
the empty token.
Deliver a client response/errorResponse from the peer identified by responderToken. Returns true if it matched a pending outbound request issued to the SAME session token. The waiter is looked up by (responderToken, id), so a reply arriving on one session can never resolve (or even reach) another session's waiter — closing the cross-session hijack without a separate owner check. A waiter registered under the empty token (stateless / shared mode) is matched only by a reply that likewise carries the empty token.