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>

.gitea/workflows/ci.yml

@@ -0,0 +1,46 @@
+name: CI
+
+on:
+  push:
+    branches: [master, main]
+  pull_request:
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    container:
+      image: php:8.4-cli
+
+    services:
+      postgres:
+        image: postgres:16
+        env:
+          POSTGRES_USER: app
+          POSTGRES_PASSWORD: app
+          POSTGRES_DB: app_test
+        options: >-
+          --health-cmd pg_isready
+          --health-interval 10s
+          --health-timeout 5s
+          --health-retries 5
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Install system dependencies
+        run: |
+          apt-get update -q && apt-get install -yq git unzip libpq-dev libmagickwand-dev \
+            && docker-php-ext-install pdo pdo_pgsql \
+            && pecl install imagick && docker-php-ext-enable imagick
+
+      - name: Install Composer
+        run: |
+          curl -sS https://getcomposer.org/installer | php -- --install-dir=/usr/local/bin --filename=composer
+
+      - name: Install dependencies
+        run: composer install --no-interaction --prefer-dist
+
+      - name: Run tests
+        env:
+          DATABASE_URL: postgresql://app:app@postgres:5432/app_test?serverVersion=16
+        run: php bin/phpunit