Fix Tuple import in verification_store.py

- Add missing Tuple import from typing module
- Resolves NameError: name 'Tuple' is not defined
- Fixes Hugging Face Spaces deployment runtime error

src/core/verification_store.py

@@ -12,7 +12,7 @@ import csv
 import io
 import logging
 from abc import ABC, abstractmethod
-from typing import Dict, List, Optional, Any, Union
+from typing import Dict, List, Optional, Any, Union, Tuple
 from datetime import datetime
 from pathlib import Path