Include full contents of all nested repositories

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

openclaw/changelog/fragments/README.md

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+# Changelog Fragments
+
+Use this directory when a PR should not edit `CHANGELOG.md` directly.
+
+- One fragment file per PR.
+- File name recommendation: `pr-<number>.md`.
+- Include at least one line with both `#<pr>` and `thanks @<contributor>`.
+
+Example:
+
+```md
+- Fix LINE monitor lifecycle wait ownership (#27001) (thanks @alice)
+```