Enhance static analysis workflow and composer config

Added argument "--prefer-dist" to forward-command in composer.json to optimize package installation. Modified GitHub workflow to include debug steps for checking phpstan dependencies and relevant content in composer.lock for better traceability in static analysis.

.github/workflows/static-analysis.yml

@@ -18,7 +18,12 @@ jobs:
           coverage: none
       - run: |
           composer install --no-interaction --no-progress --prefer-dist
-          ls -la vendor-bin/tools/  # デバッグ用
+          ls -la vendor-bin/tools/
+          cd vendor-bin/tools
+          composer why phpstan/phpstan
+          echo "composer.lock content:"
+          cat composer.lock | grep -A 5 -B 5 phpstan/phpstan
+
       - run: ./vendor/bin/phpstan analyse -c phpstan.neon --no-progress --no-interaction --error-format=checkstyle | cs2pr
 
   static-analysis-psalm:

composer.json

@@ -86,7 +86,9 @@
     "extra": {
         "bamarni-bin": {
             "bin-links": true,
-            "forward-command": true
+            "forward-command": true,
+            "forward-command-args": "--prefer-dist"
+
         }
     }
 }