feat: track frontend changelog consumption (#5218)

package.json

@@ -3,8 +3,9 @@
   "private": true,
   "type": "module",
   "scripts": {
-    "test": "node --test tests/validate-changelog-filenames.test.mjs",
-    "check:filenames": "node scripts/validate-changelog-filenames.mjs"
+    "test": "node --test tests/validate-changelog-filenames.test.mjs tests/validate-changelog-frontmatter.test.mjs",
+    "check:filenames": "node scripts/validate-changelog-filenames.mjs",
+    "check:frontmatter": "node scripts/validate-changelog-frontmatter.mjs"
   },
   "engines": {
     "node": ">=20"