GHSA-m69h-jm2f-2pv8: OpenClaw: Feishu reaction events could bypass group authorization and mention gating

A Feishu reaction-originated synthetic event could misclassify a group conversation as p2p when the inbound reaction payload omitted chat_type. Authorization and mention-gating logic keyed off that incorrect chat type and evaluated the event as a direct message instead of a group message.