Enable Zeitwerk #268

Rails 7 does not ship with classic autoloading anymore, so we need to switch to Zeitwerk. Migration guide: Classic to Zeitwork HOWTO.

Right now the main blocker are the service objects in app/services. Zeitwork expects e.g. app/services/name/fuzzy_search.rb to define Name::FuzzySearch and not Services::Name::FuzzySearch. This matches the Rails default, e.g. app/controllers/page_controller.rb defines PageController and not Controllers::PageController.

My suggestion would be to skip the name folder and move both services to top-level app/services, so we have e.g. app/services/fuzzy_search.rb which defines the class FuzzySearchService. I think this makes sense given that service objects are rarely tied to a specific model, but rather act as orchestration of multiple models. This is apparent in TypeResolver which is also in app/services/name but works on multiple models (Name, Genome, Strain).

Outstanding issues

• Service rename to work with Zeitwerk #301
• Move *SampleSet models to files following Rails conventions #294
• Change FuzzySearch service to a concern #302