ci: PHP via apt in a bookworm container, retry shopware-cli download

setup-php hangs on the runner even with runner=self-hosted; the CLI download
returned a non-gzip body once under concurrent load.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

.gitea/workflows/plugin-checks.yml

@@ -20,7 +20,8 @@ jobs:
           node-version: '20'
       - name: Install shopware-cli
         run: |
-          curl -sL https://github.com/shopware/shopware-cli/releases/latest/download/shopware-cli_Linux_x86_64.tar.gz | tar -xz -C /tmp shopware-cli
+          curl -fsSL --retry 5 --retry-delay 10 -o /tmp/swcli.tgz https://github.com/shopware/shopware-cli/releases/latest/download/shopware-cli_Linux_x86_64.tar.gz
+          tar -xzf /tmp/swcli.tgz -C /tmp shopware-cli
           sudo install /tmp/shopware-cli /usr/local/bin/shopware-cli || install /tmp/shopware-cli /usr/local/bin/shopware-cli
       - name: Validate extension
         run: shopware-cli extension validate .
@@ -36,7 +37,8 @@ jobs:
           node-version: '20'
       - name: Install shopware-cli
         run: |
-          curl -sL https://github.com/shopware/shopware-cli/releases/latest/download/shopware-cli_Linux_x86_64.tar.gz | tar -xz -C /tmp shopware-cli
+          curl -fsSL --retry 5 --retry-delay 10 -o /tmp/swcli.tgz https://github.com/shopware/shopware-cli/releases/latest/download/shopware-cli_Linux_x86_64.tar.gz
+          tar -xzf /tmp/swcli.tgz -C /tmp shopware-cli
           sudo install /tmp/shopware-cli /usr/local/bin/shopware-cli || install /tmp/shopware-cli /usr/local/bin/shopware-cli
       - name: Package extension
         run: shopware-cli extension package . --output-directory .build --filename package.zip --git-commit "$GITHUB_SHA"
@@ -55,6 +57,9 @@ jobs:
 
   phpunit:
     runs-on: ubuntu-latest
+    # shivammathur/setup-php hangs on this runner, so PHP comes from Debian bookworm (8.2) via apt.
+    container:
+      image: node:20-bookworm
     services:
       database:
         image: mariadb:11.4
@@ -64,17 +69,16 @@ jobs:
       DATABASE_URL: mysql://root:root@database:3306/shopware
       APP_ENV: test
       APP_URL: http://localhost
+      COMPOSER_MEMORY_LIMIT: '-1'
+      COMPOSER_ALLOW_SUPERUSER: '1'
     steps:
       - uses: actions/checkout@v4
         with:
           path: plugin-src
-      - uses: shivammathur/setup-php@v2
-        env:
-          runner: self-hosted # non-GitHub runner (act): without this setup-php hangs
-        with:
-          php-version: '8.3'
-          extensions: gd, intl, pdo_mysql, zip, curl, mbstring, dom, xml, fileinfo, sodium, bcmath
-          tools: composer
+      - name: Install PHP and tools
+        run: |
+          apt-get update -q
+          apt-get install -y -q --no-install-recommends php-cli php-gd php-intl php-mysql php-zip php-curl php-mbstring php-xml php-bcmath composer unzip jq git ca-certificates
       - name: Wait for the database
         run: |
           for i in $(seq 60); do