fix: make notifications migration idempotent

database/migrations/2026_09_18_021743_create_notifications_table.php

@@ -11,6 +11,7 @@ return new class extends Migration
      */
     public function up(): void
     {
+        if (!Schema::hasTable('notifications')) {
             Schema::create('notifications', function (Blueprint $table) {
                 $table->uuid('id')->primary();
                 $table->string('type');
@@ -20,6 +21,7 @@ return new class extends Migration
                 $table->timestamps();
             });
         }
+    }
 
     /**
      * Reverse the migrations.