feat(event): add effective date resolution for rescheduled events and update tests

app/Domains/Event/Models/EventDate.php

@@ -4,6 +4,7 @@ namespace App\Domains\Event\Models;
 
 use App\Domains\Catalog\Models\Variant;
 use App\Domains\Event\Enums\EventDateStatus;
+use App\Domains\Event\Services\EffectiveEventDateResolver;
 use App\Domains\Event\Services\EventDateTextFormatter;
 use App\Domains\Tenant\Models\Tenant;
 use App\Domains\Ticket\Enums\ValidityTimeType;
@@ -80,6 +81,11 @@ class EventDate extends Model
         return $this->belongsTo(self::class, 'rescheduled_to_event_date_id');
     }
 
+    public function effectiveDate(): ?self
+    {
+        return app(EffectiveEventDateResolver::class)->resolve($this);
+    }
+
     /** @return HasMany<EventDate, $this> */
     public function rescheduledFrom(): HasMany
     {