fix: update GitHub Actions workflows to use server.cjs instead of server.js

🔧 Workflow Updates:
- Update .github/workflows/ci.yml build verification to use server.cjs
- Update .github/workflows/release.yml build verification to use server.cjs

🎯 Root Cause:
GitHub Actions workflows were still referencing the old server.js file
after we changed the build output to server.cjs for ES module compatibility.

✅ Verification:
- Local build test: ✅ SUCCESS
- Build verification command: ✅ require('./build/server.cjs') works
- CI pipeline should now pass build verification step

This resolves the 'Cannot find module ./build/server.js' error
in GitHub Actions workflows.

Author: makafeli

.github/workflows/ci.yml

@@ -80,7 +80,7 @@ jobs:
           echo "Verifying main entry point..."
           node -e "
             try {
-              require('./build/server.js');
+              require('./build/server.cjs');
               console.log('✅ Build verification: SUCCESS');
             } catch (error) {
               console.error('❌ Build verification: FAILED');

.github/workflows/release.yml

@@ -75,7 +75,7 @@ jobs:
       - name: Verify build output
         run: |
           ls -la build/
-          node -e "console.log('Build verification:', require('./build/server.js') ? 'SUCCESS' : 'FAILED')"
+          node -e "console.log('Build verification:', require('./build/server.cjs') ? 'SUCCESS' : 'FAILED')"
 
       - name: Upload build artifacts
         uses: actions/upload-artifact@v4