fix: add retry logic to composer install steps to resolve DNS timeout failures

Replace bare 'composer install' with ramsey/composer-install action (which
provides built-in retry, caching, and --prefer-dist) in code-quality.yml and
tests.yml. Add a 3-attempt shell retry loop in release.yml where --no-dev
--optimize-autoloader flags are required.

phpunit.yml already used ramsey/composer-install and is unaffected.

Closes #57

.github/workflows/tests.yml

@@ -28,11 +28,10 @@ jobs:
           extensions: mbstring, intl, zip
           tools: composer:v2
 
-      - name: Clear Composer Cache
-        run: composer clear-cache
-
       - name: Install dependencies
-        run: composer install --prefer-dist --no-progress
+        uses: ramsey/composer-install@83af392bf5f031813d25e6fe4cd626cdba9a2df6 # v2.2.0
+        with:
+          composer-options: "--prefer-dist --no-progress"
 
       - name: Run tests
         run: ./vendor/bin/phpunit
@@ -54,11 +53,10 @@ jobs:
           extensions: mbstring, intl, zip
           tools: composer:v2, phpcs
 
-      - name: Clear Composer Cache
-        run: composer clear-cache
-
       - name: Install dependencies
-        run: composer install --prefer-dist --no-progress
+        uses: ramsey/composer-install@83af392bf5f031813d25e6fe4cd626cdba9a2df6 # v2.2.0
+        with:
+          composer-options: "--prefer-dist --no-progress"
 
       - name: Run PHPCS
         run: composer run phpcs