Add SMS bulk delay configuration and validate coupon phone function

database/factories/SmsCampaignFactory.php

@@ -0,0 +1,39 @@
+<?php
+
+namespace Database\Factories;
+
+use App\Models\SmsCampaign;
+use App\Models\User;
+use Illuminate\Database\Eloquent\Factories\Factory;
+
+/**
+ * @extends Factory<SmsCampaign>
+ */
+class SmsCampaignFactory extends Factory
+{
+    protected $model = SmsCampaign::class;
+
+    /**
+     * @return array<string, mixed>
+     */
+    public function definition(): array
+    {
+        return [
+            'message' => fake()->sentence(),
+            'mode' => 'all',
+            'recipient_count' => 0,
+            'sent_count' => 0,
+            'failed_count' => 0,
+            'skipped_count' => 0,
+            'created_by' => User::factory(),
+            'completed_at' => null,
+        ];
+    }
+
+    public function completed(): static
+    {
+        return $this->state(fn (array $attributes): array => [
+            'completed_at' => now(),
+        ]);
+    }
+}