* fix: reject disabled users on all backends in Bind A user with disabled = true could still bind on the config backend, since configHandler.FindUser and LDAPOpsHelper.Bind never checked Disabled while the SQL backends drop such users at lookup. Enforce it in Bind so every backend behaves the same. * fix: use configHandler.Bind rather than helper.Bind in test harness --------- Co-authored-by: kanywst <niwatakuma@icloud.com>