refactor: use existing sync script instead of inline code

Remove duplicate inline script from workflow and use the existing
scripts/sync-changelog.js which has better features:
- GitHub CLI and API token fallback support
- Test mode for local development
- Better error handling and user feedback
- Comprehensive logging

This eliminates code duplication and makes the workflow more maintainable.

Co-authored-by: rajbos <6085745+rajbos@users.noreply.github.com>

Author: Copilot

.github/workflows/sync-release-notes.yml

@@ -31,120 +31,8 @@ jobs:
       env:
         GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
       run: |
-        # Create a script to fetch GitHub releases and update CHANGELOG.md
-        cat > sync_changelog.js << 'EOF'
-        const { execSync } = require('child_process');
-        const fs = require('fs');
-        
-        async function syncReleaseNotes() {
-          try {
-            console.log('Fetching GitHub releases...');
-            
-            // Fetch all releases using GitHub CLI
-            const releasesJson = execSync('gh release list --json tagName,name,body,createdAt,isPrerelease --limit 50', { encoding: 'utf8' });
-            const releases = JSON.parse(releasesJson);
-            
-            console.log(`Found ${releases.length} releases`);
-            
-            // Sort releases by creation date (newest first)
-            releases.sort((a, b) => new Date(b.createdAt) - new Date(a.createdAt));
-            
-            // Read current CHANGELOG.md
-            let changelog = '';
-            if (fs.existsSync('CHANGELOG.md')) {
-              changelog = fs.readFileSync('CHANGELOG.md', 'utf8');
-            }
-            
-            // Extract the header and unreleased section
-            const lines = changelog.split('\n');
-            const headerEndIndex = lines.findIndex(line => line.startsWith('## [Unreleased]'));
-            const unreleasedEndIndex = lines.findIndex((line, index) => 
-              index > headerEndIndex && line.startsWith('## [') && !line.includes('Unreleased')
-            );
-            
-            let header = '';
-            let unreleasedSection = '';
-            
-            if (headerEndIndex >= 0) {
-              header = lines.slice(0, headerEndIndex + 1).join('\n');
-              if (unreleasedEndIndex >= 0) {
-                unreleasedSection = lines.slice(headerEndIndex + 1, unreleasedEndIndex).join('\n');
-              } else {
-                // Take everything after unreleased header until we find a release or end
-                const restOfFile = lines.slice(headerEndIndex + 1);
-                const nextReleaseIndex = restOfFile.findIndex(line => line.startsWith('## [') && !line.includes('Unreleased'));
-                if (nextReleaseIndex >= 0) {
-                  unreleasedSection = restOfFile.slice(0, nextReleaseIndex).join('\n');
-                } else {
-                  unreleasedSection = restOfFile.join('\n');
-                }
-              }
-            } else {
-              // Create basic header if none exists
-              header = '# Change Log\n\nAll notable changes to the "copilot-token-tracker" extension will be documented in this file.\n\nCheck [Keep a Changelog](http://keepachangelog.com/) for recommendations on how to structure this file.\n\n## [Unreleased]';
-              unreleasedSection = '\n';
-            }
-            
-            // Build new changelog content
-            let newChangelog = header + unreleasedSection + '\n';
-            
-            // Add releases
-            for (const release of releases) {
-              const version = release.tagName.startsWith('v') ? release.tagName.substring(1) : release.tagName;
-              const releaseType = release.isPrerelease ? ' - Pre-release' : '';
-              
-              newChangelog += `## [${version}]${releaseType}\n\n`;
-              
-              if (release.body && release.body.trim()) {
-                // Clean up the release body
-                let body = release.body.trim();
-                
-                // Remove any "Full Changelog" links at the end
-                body = body.replace(/\*\*Full Changelog\*\*:.*$/gm, '').trim();
-                
-                // Ensure bullet points are properly formatted
-                const bodyLines = body.split('\n').map(line => {
-                  line = line.trim();
-                  if (line && !line.startsWith('-') && !line.startsWith('*') && !line.startsWith('#')) {
-                    return `- ${line}`;
-                  }
-                  return line;
-                }).filter(line => line.length > 0);
-                
-                newChangelog += bodyLines.join('\n') + '\n\n';
-              } else {
-                newChangelog += `- Release ${version}\n\n`;
-              }
-            }
-            
-            // Write the new changelog
-            fs.writeFileSync('CHANGELOG.md', newChangelog.trim() + '\n');
-            console.log('CHANGELOG.md updated successfully!');
-            
-            // Show what changed
-            try {
-              const diff = execSync('git diff CHANGELOG.md', { encoding: 'utf8' });
-              if (diff.trim()) {
-                console.log('\nChanges made to CHANGELOG.md:');
-                console.log(diff);
-              } else {
-                console.log('No changes needed - CHANGELOG.md is already up to date');
-              }
-            } catch (error) {
-              console.log('Could not show diff, but file was updated');
-            }
-            
-          } catch (error) {
-            console.error('Error syncing release notes:', error);
-            process.exit(1);
-          }
-        }
-        
-        syncReleaseNotes();
-        EOF
-        
-        # Run the sync script
-        node sync_changelog.js
+        # Run the sync script from the scripts directory
+        node scripts/sync-changelog.js
         
     - name: Check for changes
       id: changes