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

database/seeders/DatabaseSeeder.php

@@ -13,7 +13,10 @@ class DatabaseSeeder extends Seeder
      */
     public function run(): void
     {
-        $this->call(AdminSeeder::class);
+        $this->call([
+            PlanSeeder::class,
+            AdminSeeder::class,
+        ]);
 
         User::factory()->create([
             'name' => 'Test User',