loadUserByUsername now calls findByEmail and returns email as the Spring Security principal name. Tests updated to assert email identity. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
loadUserByUsername now calls findByEmail and returns email as the Spring Security principal name. Tests updated to assert email identity. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>