fix(ci): use node script instead of npm version for VS Code extension stamp

npm version rejects 4-segment versions (e.g. 0.1.0.44) since it
requires semver. Replace with a node -e script that writes the version
directly to package.json.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: ryanbas21

.github/workflows/release.yml

@@ -80,8 +80,12 @@ jobs:
         env:
           BUILD_NUMBER: ${{ github.run_number }}
         run: |
-          BASE=$(node -p "require('./package.json').version")
-          npm version "${BASE}.${BUILD_NUMBER}" --no-git-tag-version
+          node -e "
+            const fs = require('fs');
+            const pkg = JSON.parse(fs.readFileSync('package.json', 'utf8'));
+            pkg.version = pkg.version + '.' + process.env.BUILD_NUMBER;
+            fs.writeFileSync('package.json', JSON.stringify(pkg, null, 2) + '\n');
+          "
 
       - name: Publish VS Code extension (pre-release)
         if: inputs.extension