Add torch dependency for transformers

Fix runtime error: added torch>=2.0.0 as a dependency. The transformers library requires PyTorch (torch) to initialize pipelines. This resolves the NameError: name 'torch' is not defined error in transformers/pipelines/__init__.py

requirements.txt

@@ -13,6 +13,9 @@ pandas>=2.0.0
 
 # Agent framework - vendor neutral
 # smolagents will be our own implementation
+
+# ML/NLP dependencies for lead_scoring_agent.py
+torch>=2.0.0  # Required by transformers
 transformers>=4.35.0  # Required for HuggingFace models in lead_scoring_agent.py
 
 # Optional: Additional tool support