FIX: IP lookup logging autoload

[merefield]

Summary

This fixes the IP lookup logging helper so Sidekiq jobs and related lookup classes can resolve it reliably under Zeitwerk autoloading.

The previous implementation added ip_lookup_log by reopening Locations directly, which is not a stable autoload target. In some runtime paths,
especially background jobs, that method could be missing and IP lookup would fail when logging was invoked.

Changes

• move IP lookup logging behind an autoloadable constant: Locations::LoggingHelper.ip_lookup_log
• update all IP lookup / GeoNames call sites to use Locations::LoggingHelper
• add spec coverage for logging enabled and disabled behavior

Files Changed

• app/jobs/regular/locations/ip_location_lookup.rb
• lib/locations/geo_location_builder.rb
• lib/locations/geo_names_client.rb
• lib/locations/geo_names_granularity_picker.rb
• lib/locations/logging_helper.rb
• spec/lib/locations/logging_helper_spec.rb

Verification

• bin/rspec plugins/discourse-locations/spec/lib/locations/logging_helper_spec.rb