fix: remove sentinel variable

fix: metrics are disabled by default

database/migrations/2024_06_18_105947_disable_server_metrics_by_default.php

@@ -0,0 +1,31 @@
+<?php
+
+use App\Models\Server;
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    /**
+     * Run the migrations.
+     */
+    public function up(): void
+    {
+        Schema::table('servers', function (Blueprint $table) {
+            $table->boolean('is_metrics_enabled')->default(false)->change();
+        });
+        Server::where('is_metrics_enabled', true)->update(['is_metrics_enabled' => false]);
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::table('servers', function (Blueprint $table) {
+            $table->boolean('is_metrics_enabled')->default(true)->change();
+        });
+        Server::where('is_metrics_enabled', false)->update(['is_metrics_enabled' => true]);
+    }
+};