feat: Implement random password and token generation for tests

tests/utils/security.py

@@ -0,0 +1,13 @@
+from __future__ import annotations
+
+import secrets
+
+
+def random_password() -> str:
+    """Return a strong test password that satisfies complexity checks."""
+    return f"Aa1!{secrets.token_urlsafe(16)}"
+
+
+def random_token() -> str:
+    """Return a random token suitable for test session data."""
+    return secrets.token_urlsafe(24)