feat(users): enforce active email uniqueness per role

app/Domains/Staff/Requests/UpdateStaffRequest.php

@@ -2,6 +2,7 @@
 
 namespace App\Domains\Staff\Requests;
 
+use App\Domains\Authorization\Enums\RoleCode;
 use Illuminate\Foundation\Http\FormRequest;
 use Illuminate\Validation\Rule;
 
@@ -12,6 +13,13 @@ class UpdateStaffRequest extends FormRequest
         return true;
     }
 
+    protected function prepareForValidation(): void
+    {
+        if (is_string($this->input('email'))) {
+            $this->merge(['email' => mb_strtolower(trim($this->input('email')))]);
+        }
+    }
+
     /** @return array<string, mixed> */
     public function rules(): array
     {
@@ -28,7 +36,7 @@ class UpdateStaffRequest extends FormRequest
                 'required',
                 'email',
                 'max:255',
-                Rule::unique('users', 'email')
+                Rule::unique('users', 'active_email')->where('rol_codigo', RoleCode::Scanner->value)
                     ->whereNull('deleted_at')
                     ->ignore($staffId),
             ],