fix: remove duplicate huggingface-hub, update tenacity version

- Removed duplicate huggingface-hub==1.2.3 (already have >=0.26.0)
- Updated tenacity from >=8.2.0 to >=9.1.2 (match pyproject.toml)

Co-Authored-By: Claude <noreply@anthropic.com>

requirements.txt

@@ -63,6 +63,5 @@ python-dotenv>=1.0.0       # Environment variable management
 # ============================================================================
 pydantic>=2.0.0            # Data validation (for StateGraph)
 typing-extensions>=4.12.0  # Type hints support
-tenacity>=8.2.0            # Retry logic with exponential backoff
+tenacity>=9.1.2            # Retry logic with exponential backoff
 datasets==4.4.2
-huggingface-hub==1.2.3