Summary

Refactor the recent-food module infrastructure to encapsulate implementation details: export only factory functions and keep helper functions file-local.

Part of #1403

Scope / Representative files

• src/modules/recent-food/infrastructure/recentFoodRepository.ts
• src/modules/recent-food/infrastructure/supabase/supabaseRecentFoodGateway.ts
• src/modules/recent-food/infrastructure/supabase/supabaseRecentFoodMapper.ts
• src/modules/recent-food/infrastructure/signals/recentFoodCacheStore.ts
• src/modules/recent-food/infrastructure/supabase/realtime.ts

Deliverables

• Implementation files export only factories (e.g., createRecentFoodRepository, createSupabaseRecentFoodGateway).
• Internal helper functions removed from exports.
• All call-sites import factories and use repository/gateway instances.
• TypeScript/lint/tests pass for the module.

Acceptance Criteria

• No named exports for internal helpers remain in the module infra files.
• Call sites updated and compile cleanly.