fix(pb): unexpected error on 'upload_voice'

Author: wyapx

lagrange/pb/highway/comm.py

@@ -34,7 +34,7 @@ class AudioExtInfo(ProtoStruct):
 
 
 class ExtBizInfo(ProtoStruct):
-    pic: PicExtInfo = proto_field(1, default_factory=PicExtInfo)
+    pic: Optional[PicExtInfo] = proto_field(1, default_factory=PicExtInfo)
     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)