🚀 feat(memories.py): set default value for memory_key field to "chat_history"

The memory_key field is now set to "chat_history" by default. This change ensures that the memory_key field is always initialized with a default value, which is useful for the application's functionality.

src/backend/langflow/template/frontend_node/memories.py

@@ -62,3 +62,5 @@ class MemoryFrontendNode(FrontendNode):
             field.show = True
             field.advanced = True
             field.value = ""
+        if field.name == "memory_key":
+            field.value = "chat_history"