chore: add changelog cleanup workflow and remove Claude attribution

.github/workflows/release.yaml

@@ -58,3 +58,17 @@ jobs:
           NPM_TOKEN: ${{ secrets.NPM_TOKEN }}
           NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}
         run: npm run release
+      - name: Clean changelog formatting
+        if: github.event_name == 'push'
+        run: |
+          git config user.name "github-actions[bot]"
+          git config user.email "github-actions[bot]@users.noreply.github.com"
+          # Remove any Claude Code attribution from changelog
+          sed -i '/🤖 Generated with \[Claude Code\]/,+2d' CHANGELOG.md || true
+          # Format and commit if changes exist
+          npm run format
+          if ! git diff --quiet CHANGELOG.md; then
+            git add CHANGELOG.md
+            git commit -m "chore: clean changelog formatting [skip ci]"
+            git push
+          fi