added empty callbacks

pipeline.py

@@ -192,33 +192,21 @@ CACHE_SIZE_LIMIT = 1000
 #     raise RuntimeError("ChatGroq initialization failed.") from e
 
 
+from langchain_core.callbacks import CallbackManager
+from langchain_core.callbacks.base import BaseCallbackHandler
 
-# Define a no-op callback handler
-class NoOpCallbacks(BaseCallbacks):
-    """No-op callback handler."""
-    def on_llm_start(self, *args, **kwargs): pass
-    def on_llm_end(self, *args, **kwargs): pass
-    def on_llm_error(self, *args, **kwargs): pass
-    def on_chain_start(self, *args, **kwargs): pass
-    def on_chain_end(self, *args, **kwargs): pass
-    def on_chain_error(self, *args, **kwargs): pass
-
-# Create a callback manager with no-op callbacks
-callback_manager = CallbackManager([StdOutCallbackHandler()])
 
 # Initialize ChatGroq with the callback manager
 try:
-    fallback_groq_api_key = os.environ.get("GROQ_API_KEY_FALLBACK", "GROQ_API_KEY")
+    fallback_groq_api_key = os.environ.get("GROQ_API_KEY_FALLBACK", os.environ.get("GROQ_API_KEY"))
     groq_fallback_llm = ChatGroq(
         model=GROQ_MODELS["default"],
         temperature=0.7,
         groq_api_key=fallback_groq_api_key,
         max_tokens=2048,
-        callback_manager=callback_manager  # Add the callback manager here
+         callback_manager=CallbackManager([])  # Add the callback manager here
     )
     
-    # Rebuild the model after initialization
-    ChatGroq.model_rebuild()
     
 except Exception as e:
     logger.error(f"Failed to initialize ChatGroq: {e}")