chore: import upstream snapshot with attribution

zep-memory-assistant/util.py

@@ -0,0 +1,7 @@
+import re
+
+
+def generate_user_id(first_name, last_name):
+    """Generates a consistent user ID from first and last name."""
+    user_id = re.sub(r"\W+", "", (first_name + last_name).lower())
+    return user_id if user_id else "default_user"