CVE-2025-64517: sudo-rs doesn't record authenticating user properly in timestamp

When Defaults targetpw (or Defaults rootpw) is enabled, the password of the target account (or root account) instead of the invoking user is used for authentication. sudo-rs prior to 0.2.10 incorrectly recorded the invoking user’s UID instead of the authenticated-as user’s UID in the authentication timestamp. Any later sudo invocation on the same terminal while the timestamp was still valid would use that timestamp, potentially bypassing new authentication even if the policy would have required it.