feat: realtime pre consume

(cherry picked from commit d87917f8f6eb9d2e144a9f840d6d91767ea2eb69)

relay/common/relay_info.go

@@ -23,6 +23,7 @@ type RelayInfo struct {
 	ApiType              int
 	IsStream             bool
 	IsPlayground         bool
+	UsePrice             bool
 	RelayMode            int
 	UpstreamModelName    string
 	OriginModelName      string