increase grpc msg limit

exo/networking/grpc/grpc_peer_handle.py

@@ -32,7 +32,11 @@ class GRPCPeerHandle(PeerHandle):
 
   async def connect(self):
     if self.channel is None:
-      self.channel = grpc.aio.insecure_channel(self.address, options=[("grpc.max_metadata_size", 32*1024*1024)])
+      self.channel = grpc.aio.insecure_channel(self.address, options=[
+        ("grpc.max_metadata_size", 32*1024*1024),
+        ('grpc.max_receive_message_length', 32*1024*1024),
+        ('grpc.max_send_message_length', 32*1024*1024)
+      ])
       self.stub = node_service_pb2_grpc.NodeServiceStub(self.channel)
     await self.channel.channel_ready()