feat: add chapter eight call records

server/topic.go

@@ -1186,6 +1186,13 @@ func (t *Topic) handlePubBroadcast(msg *ClientComMessage) {
 			msg.sess.queueOut(ErrCallBusyReply(msg, types.TimeNow()))
 			return
 		}
+		head, content, err := normalizeCallInvite(msg.Pub.Head, msg.Pub.Content)
+		if err != nil {
+			msg.sess.queueOut(ErrMalformedReply(msg, types.TimeNow()))
+			return
+		}
+		msg.Pub.Head = head
+		msg.Pub.Content = content
 	}
 
 	// Save to DB at master topic.