🐛 fix(utils.py): fix import order to avoid import errors

The import order was changed to avoid import errors. The import of langchain was moved to the top of the file to avoid circular import errors.

src/backend/langflow/interface/utils.py

@@ -63,11 +63,12 @@ def extract_input_variables_from_prompt(prompt: str) -> list[str]:
 
 def setup_llm_caching():
     """Setup LLM caching."""
-    import langchain
-    from langflow.settings import settings
-    from langflow.interface.importing.utils import import_class
 
     try:
+        import langchain
+        from langflow.settings import settings
+        from langflow.interface.importing.utils import import_class
+
         cache_class = import_class(f"langchain.cache.{settings.cache}")
 
         logger.debug(f"Setting up LLM caching with {cache_class.__name__}")