Add requests library for LinkedIn API integration

requirements.txt

@@ -19,6 +19,6 @@ torch>=2.0.0  # Required by transformers
 transformers>=4.35.0  # Required for HuggingFace models in lead_scoring_agent.py
 
 # Optional: Additional tool support
-# requests>=2.31.0  # For web tools
+requests>=2.31.0  # Required for LinkedIn API calls
 # beautifulsoup4>=4.12.0  # For HTML parsing
 # Pillow>=10.0.0  # For image tools