OpenClaw affected by iMessage remote attachment SCP hardening (strict host-key checks and remoteHost validation)

Summary Remote iMessage attachment fetches used SCP with trust-on-first-use host-key behavior and accepted unvalidated remote host tokens. Before the fix: - SCP used StrictHostKeyChecking=accept-new in the remote attachment path. - channels.imessage.remoteHost was not validated as a strict SSH ho...