Partition autosplit feature

Author: vgvoleg

ydb/_grpc/grpcwrapper/ydb_topic.py

@@ -696,6 +696,20 @@ def to_proto(self) -> ydb_topic_pb2.StreamReadMessage.StopPartitionSessionRespon
                 partition_session_id=self.partition_session_id,
             )
 
+    @dataclass
+    class EndPartitionSession(IFromProto):
+        partition_session_id: int
+        adjacent_partition_ids: List[int]
+        child_partition_ids: List[int]
+
+        @staticmethod
+        def from_proto(msg: ydb_topic_pb2.StreamReadMessage.EndPartitionSession):
+            return StreamReadMessage.EndPartitionSession(
+                partition_session_id=msg.partition_session_id,
+                adjacent_partition_ids=list(msg.adjacent_partition_ids),
+                child_partition_ids=list(msg.child_partition_ids),
+            )
+
     @dataclass
     class FromClient(IToProto):
         client_message: "ReaderMessagesFromClientToServer"