feat: integrate changelog aggregation into release workflow and update changelog header

Author: brionmario

.github/workflows/release.yml

@@ -62,11 +62,7 @@ jobs:
         with:
           title: "[Release] [GitHub Action] Update package versions"
           publish: pnpm publish:packages
-          version: pnpm version:packages
+          version: pnpm version:packages && pnpm aggregate-changelogs
           commit: "[WSO2 Release] [GitHub Action] [Release] [skip ci] update package versions"
         env:
           GITHUB_TOKEN: ${{ env.GH_TOKEN }}
-
-      - name: 📝 Aggregate CHANGELOGs
-        id: aggregate-changelogs
-        run: pnpm aggregate-changelogs

CHANGELOG.md

@@ -1,3 +1,5 @@
+<!-- THIS FILE IS AUTOGENERATED. DO NOT EDIT DIRECTLY. -->
+
 # Aggregated CHANGELOG
 
 ## Table of Contents

scripts/aggregate-changelogs.js

@@ -70,7 +70,8 @@ const findChangelogs = (dir) => {
 
 const aggregate = () => {
   const changelogFiles = findChangelogs(rootDir);
-  let toc = '# Aggregated CHANGELOG\n\n';
+  let toc = '<!-- THIS FILE IS AUTOGENERATED. DO NOT EDIT DIRECTLY. -->\n\n';
+  toc += '# Aggregated CHANGELOG\n\n';
   toc += '## Table of Contents\n\n';
   changelogFiles.forEach(file => {
     const relPath = path.relative(rootDir, file);