fix(pb): unexpected error on 'upload_grp_image'

Author: wyapx

lagrange/pb/highway/comm.py

@@ -35,8 +35,8 @@ class AudioExtInfo(ProtoStruct):
 
 class ExtBizInfo(ProtoStruct):
     pic: PicExtInfo = proto_field(1, default_factory=PicExtInfo)
-    video: VideoExtInfo = proto_field(2, default_factory=VideoExtInfo)
-    audio: AudioExtInfo = proto_field(3, default_factory=AudioExtInfo)
+    video: Optional[VideoExtInfo] = proto_field(2, default_factory=VideoExtInfo)
+    audio: Optional[AudioExtInfo] = proto_field(3, default_factory=AudioExtInfo)
     bus_type: Optional[int] = proto_field(4, default=None)