Use keyword arguments for ApplicationService calls

Not all services are using keywords, which breaks those calls in Ruby 3

app/services/ldap_manager/fetch_avatar.rb

@@ -1,12 +1,11 @@
 module LdapManager
   class FetchAvatar < LdapManagerService
-    def initialize(cn:, ou: nil)
+    def initialize(cn:)
       @cn = cn
-      @ou = ou
     end
 
     def call
-      treebase   = @ou ? "ou=#{@ou},cn=users,#{suffix}" : ldap_config["base"]
+      treebase   = ldap_config["base"]
       attributes = %w{ jpegPhoto }
       filter     = Net::LDAP::Filter.eq("cn", @cn)
 

app/services/ldap_manager/update_avatar.rb

@@ -2,7 +2,7 @@ require "image_processing/vips"
 
 module LdapManager
   class UpdateAvatar < LdapManagerService
-    def initialize(dn, file)
+    def initialize(dn:, file:)
       @dn = dn
       @img_data = process(file)
     end

app/services/ldap_manager/update_display_name.rb

@@ -1,6 +1,6 @@
 module LdapManager
   class UpdateDisplayName < LdapManagerService
-    def initialize(dn, display_name)
+    def initialize(dn:, display_name:)
       @dn = dn
       @display_name = display_name
     end

app/services/ldap_manager/update_email.rb

@@ -1,6 +1,6 @@
 module LdapManager
   class UpdateEmail < LdapManagerService
-    def initialize(dn, address)
+    def initialize(dn:, address:)
       @dn = dn
       @address = address
     end

app/services/ldap_manager/update_email_maildrop.rb

@@ -1,6 +1,6 @@
 module LdapManager
   class UpdateEmailMaildrop < LdapManagerService
-    def initialize(dn, address)
+    def initialize(dn:, address:)
       @dn = dn
       @address = address
     end

app/services/ldap_manager/update_email_password.rb

@@ -1,6 +1,6 @@
 module LdapManager
   class UpdateEmailPassword < LdapManagerService
-    def initialize(dn, password_hash)
+    def initialize(dn:, password_hash:)
       @dn = dn
       @password_hash = password_hash
     end