Refactor ticket validity handling and improve tests

- Updated tests for Accommodation, Entry, Food, Merchandise, and Sale controllers to use soft deletes for variants and ensure proper inventory counts.
- Enhanced ticket generation logic to resolve validity from soft-deleted catalog sources.
- Introduced a new TicketValidityResolver service to manage ticket validity based on event dates and variant definitions.
- Removed unnecessary database assertions and improved the clarity of validity checks in tests.
- Added comprehensive tests for the new TicketValidityResolver service, ensuring correct handling of event dates and multi-select options.
- Cleaned up unused code and assertions in existing tests for better maintainability.

app/Domains/Event/Models/EventDate.php

@@ -43,7 +43,6 @@ class EventDate extends Model
             $eventDate->syncTenantDateText();
             ValidityTime::query()
                 ->whereKey($eventDate->validity_time_id)
-                ->whereDoesntHave('ticketValidityGroups')
                 ->delete();
         });
     }