QQ's bot API requires a msg_id (original inbound message ID) to send a
passive reply. Without it the request is treated as a proactive message
and fails with error 40034102 (无权限). The message_id was already stored
in InboundMessage.metadata and forwarded to OutboundMessage, but was never
read in send().
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
GabrielWithTinaandClaude Sonnet 4.6