Fix PermissionError: Use temp dir for image logs

app/validator.py

@@ -1260,7 +1260,8 @@ RESPOND WITH JSON ONLY - NO ADDITIONAL TEXT OR MARKDOWN.
         # --- START NEW IMAGE LOGGING SETUP ---
         # Create persistent log directory for troubleshooting
         timestamp = datetime.now().strftime("%Y%m%d_%H%M%S_%f")[:-3]  # Remove last 3 digits of microseconds
-        log_dir_name = f"extracted_images_log/{timestamp}"
+        # Use temp directory for logs to avoid PermissionError in read-only environments
+        log_dir_name = os.path.join(tempfile.gettempdir(), "extracted_images_log", timestamp)
         
         # Create the persistent log folder
         os.makedirs(log_dir_name, exist_ok=True)