* fix: validate optional email fields when input is provided #27299 * fix: validate optional email fields when input is provided * fix: validate optional email fields when input is provided * refactor: move empty value handling out of zod-utils * fix: remove PII from error logs * test: verify optional email allows empty submission * test: e2e validation for optional email using url state --------- Co-authored-by: Eunjae Lee <hey@eunjae.dev> Co-authored-by: Romit <85230081+romitg2@users.noreply.github.com> Co-authored-by: Peer Richelsen <peeroke@gmail.com>