fix(asyncio): replaced deepcopy with copy due to serialization problems

Author: PeriniM

examples/openai/search_graph_openai.py

@@ -28,7 +28,7 @@
 # ************************************************
 
 search_graph = SearchGraph(
-    prompt="List me the best escursions near Trento",
+    prompt="List me Chioggia's famous dishes",
     config=graph_config
 )
 

scrapegraphai/nodes/graph_iterator_node.py

@@ -11,7 +11,7 @@
 from .base_node import BaseNode
 
 
-_default_batchsize = 4
+_default_batchsize = 2
 
 
 class GraphIteratorNode(BaseNode):
@@ -118,7 +118,7 @@ async def _async_run(graph):
 
         # creates a deepcopy of the graph instance for each endpoint
         for url in urls:
-            instance = copy.deepcopy(graph_instance)
+            instance = copy.copy(graph_instance)
             instance.source = url
 
             participants.append(instance)