ci-cleaner: add protected-files fallback-to-issue (#23472)

* Initial plan

* Add protected-files: fallback-to-issue to hourly-ci-cleaner safe-outputs

Agent-Logs-Url: https://github.com/github/gh-aw/sessions/8e820f77-9726-4b0a-a37c-61f9bb8132b0

Co-authored-by: pelikhan <4175913+pelikhan@users.noreply.github.com>

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: pelikhan <4175913+pelikhan@users.noreply.github.com>
Co-authored-by: Peli de Halleux <pelikhan@users.noreply.github.com>

Author: Copilot

.github/workflows/hourly-ci-cleaner.lock.yml

@@ -109,6 +109,7 @@ safe-outputs:
   create-pull-request:
     expires: 2d
     title-prefix: "[ca] "
+    protected-files: fallback-to-issue
   missing-tool:
 timeout-minutes: 45
 imports: