fix(auth.ldap): skip LdapOptionsValidator when Enabled=false; bump 0.1.1

A disabled LDAP provider's connection fields are inert — don't require
Server/SearchBase/ServiceAccountDn at startup when Enabled=false. Surfaced
by the MxGateway 1.2 review (dashboard LDAP can be disabled). +1 test.

ZB.MOM.WW.Auth/Directory.Build.props

@@ -5,7 +5,7 @@
     <Nullable>enable</Nullable>
     <ImplicitUsings>enable</ImplicitUsings>
     <LangVersion>latest</LangVersion>
-    <Version>0.1.0</Version>
+    <Version>0.1.1</Version>
     <ManagePackageVersionsCentrally>true</ManagePackageVersionsCentrally>
   </PropertyGroup>