add set scheduling api

backend/app/Schedule/UseCases/GetSchedule/GetSchedule.php

@@ -0,0 +1,30 @@
+<?php
+
+namespace App\Schedule\UseCases\GetSchedule;
+
+use App\Exceptions\NotFoundException;
+use App\Schedule\Schedule;
+use App\Schedule\ScheduleRepository;
+
+class GetSchedule
+{
+    public function __construct(
+        private ScheduleRepository $scheduleRepository,
+    ) {}
+
+    /**
+     * @throws NotFoundException
+     */
+    public function execute(GetScheduleRequest $request): Schedule
+    {
+        $schedule = $this->scheduleRepository->findForUser(
+            $request->scheduleId,
+            $request->user,
+        );
+        if ($schedule === null) {
+            throw new NotFoundException('schedule not found');
+        }
+
+        return $schedule;
+    }
+}

backend/app/Schedule/UseCases/GetSchedule/GetScheduleRequest.php

@@ -0,0 +1,13 @@
+<?php
+
+namespace App\Schedule\UseCases\GetSchedule;
+
+use App\User\User;
+
+final readonly class GetScheduleRequest
+{
+    public function __construct(
+        public int $scheduleId,
+        public User $user,
+    ) {}
+}