feat(story-1.1): scaffold Symfony 7.4 LTS app with DDEV, Messenger, Scheduler

- DDEV config: PHP 8.4, PostgreSQL 16, nginx-fpm, Imagick via webimage_extra_packages
- Symfony 7.4 LTS skeleton + webapp pack scaffolded via Composer
- Removed AssetMapper, Stimulus, UX-Turbo (replaced by Vue 3 SPA per architecture)
- Added symfony/messenger + symfony/scheduler (Doctrine transport)
- Gitea CI workflow: PHP 8.4 container + PostgreSQL 16 service, runs phpunit

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/Kernel.php

@@ -0,0 +1,11 @@
+<?php
+
+namespace App;
+
+use Symfony\Bundle\FrameworkBundle\Kernel\MicroKernelTrait;
+use Symfony\Component\HttpKernel\Kernel as BaseKernel;
+
+class Kernel extends BaseKernel
+{
+    use MicroKernelTrait;
+}

src/Schedule.php

@@ -0,0 +1,28 @@
+<?php
+
+namespace App;
+
+use Symfony\Component\Scheduler\Attribute\AsSchedule;
+use Symfony\Component\Scheduler\Schedule as SymfonySchedule;
+use Symfony\Component\Scheduler\ScheduleProviderInterface;
+use Symfony\Contracts\Cache\CacheInterface;
+
+#[AsSchedule]
+class Schedule implements ScheduleProviderInterface
+{
+    public function __construct(
+        private CacheInterface $cache,
+    ) {
+    }
+
+    public function getSchedule(): SymfonySchedule
+    {
+        return (new SymfonySchedule())
+            ->stateful($this->cache) // ensure missed tasks are executed
+            ->processOnlyLastMissedRun(true) // ensure only last missed task is run
+
+            // add your own tasks here
+            // see https://symfony.com/doc/current/scheduler.html#attaching-recurring-messages-to-a-schedule
+        ;
+    }
+}