Update evidence_validator.py

evidence_validator.py

@@ -16,11 +16,26 @@ from datetime import datetime, timedelta
 from urllib.parse import urlparse
 import logging
 import asyncio
-import aiohttp
 from concurrent.futures import ThreadPoolExecutor
 
-from git import Repo
-from pydriller import Repository as PyDrillerRepo
+# Optional imports with graceful fallbacks
+try:
+    import aiohttp
+    HAS_AIOHTTP = True
+except ImportError:
+    HAS_AIOHTTP = False
+
+try:
+    from git import Repo
+    HAS_GIT = True
+except ImportError:
+    HAS_GIT = False
+
+try:
+    from pydriller import Repository as PyDrillerRepo
+    HAS_PYDRILLER = True
+except ImportError:
+    HAS_PYDRILLER = False
 
 # Handle both modular and flat imports
 try: