Add missing memoization for ContainerRepository client

ee/app/services/geo/container_repository_sync.rb

@@ -5,6 +5,7 @@ require 'tempfile'
 module Geo
   class ContainerRepositorySync
     include ExclusiveLeaseGuard
+    include Gitlab::Utils::StrongMemoize
 
     LEASE_TIMEOUT = 1.hour.freeze
 
@@ -96,10 +97,12 @@ module Geo
 
     # The client for primary registry
     def client
+      strong_memoize(:client) do
         ContainerRegistry::Client.new(
           Gitlab.config.geo.registry_replication.primary_api_url,
           token: ::Auth::ContainerRegistryAuthenticationService.pull_access_token(name)
         )
       end
     end
+  end
 end