Add subscription tiers, notification preferences, and logging infrastructure

- Add database migrations for plans, subscriptions, notification preferences, and notification log tables
- Implement DispatchUserNotificationJob to handle channel resolution, daily limits, and logging (sent/tier_restricted/daily_limit)
- Add SendScheduledWhatsAppJob for scheduled notification delivery
- Create PlanFeatures service to resolve tier capabilities, check daily limits, and validate fuel

app/Filament/Resources/Plans/Pages/EditPlan.php

@@ -0,0 +1,24 @@
+<?php
+
+namespace App\Filament\Resources\Plans\Pages;
+
+use App\Filament\Resources\Plans\PlanResource;
+use Filament\Resources\Pages\EditRecord;
+use Illuminate\Support\Facades\Cache;
+
+class EditPlan extends EditRecord
+{
+    protected static string $resource = PlanResource::class;
+
+    protected function getHeaderActions(): array
+    {
+        return [];
+    }
+
+    protected function afterSave(): void
+    {
+        if (Cache::supportsTags()) {
+            Cache::tags(['plans'])->flush();
+        }
+    }
+}