fix(customer): flush customer repository cache on model writes

Writes that bypass the cached repository (e.g. client preferences)
left stale customers in cache, so admin sending a marketing template
got 422 although the customer had opted back in.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

app/Models/Customer.php

@@ -2,11 +2,13 @@
 
 namespace App\Models;
 
+use App\Services\Cache\CacheServiceInterface;
 use App\Traits\LogsActivity;
 use Illuminate\Database\Eloquent\Concerns\HasUuids;
 use Illuminate\Database\Eloquent\Factories\HasFactory;
 use Illuminate\Database\Eloquent\SoftDeletes;
 use Illuminate\Foundation\Auth\User as Authenticatable;
+use Illuminate\Support\Facades\DB;
 use Tymon\JWTAuth\Contracts\JWTSubject;
 
 class Customer extends Authenticatable implements JWTSubject
@@ -15,6 +17,16 @@ class Customer extends Authenticatable implements JWTSubject
 
     protected $table = 'customers';
 
+    protected static function booted(): void
+    {
+        $flushRepositoryCache = fn () => DB::afterCommit(
+            fn () => app(CacheServiceInterface::class)->clearByModule('customer')
+        );
+        static::saved($flushRepositoryCache);
+        static::deleted($flushRepositoryCache);
+        static::restored($flushRepositoryCache);
+    }
+
     /**
      * Chỉ định cột sẽ nhận UUID.
      * Mặc định HasUuids dùng cột 'id', mình đổi sang 'uuid'.