completed story 1.1 with QA tests and fixes

app/Models/WorkingHour.php

@@ -0,0 +1,34 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Model;
+
+class WorkingHour extends Model
+{
+    use HasFactory;
+
+    protected $fillable = [
+        'day_of_week',
+        'start_time',
+        'end_time',
+        'is_active',
+    ];
+
+    protected function casts(): array
+    {
+        return [
+            'day_of_week' => 'integer',
+            'is_active' => 'boolean',
+        ];
+    }
+
+    /**
+     * Scope to filter active working hours.
+     */
+    public function scopeActive($query)
+    {
+        return $query->where('is_active', true);
+    }
+}