docs: add local scheduled maintenance runner (no auto-push)

docs/runbooks/DOCS_SERVICES_AUTOMATION_RUNBOOK.md

@@ -60,6 +60,34 @@ cd /Users/apple/github-projects/microdao-daarion
 bash scripts/docs/docs_sync.sh --apply --targets github,gitea
 ```
 
+## 5) Local scheduled run (no auto-push)
+
+Install/update daily cron job (local timezone):
+
+```bash
+cd /Users/apple/github-projects/microdao-daarion
+bash scripts/docs/install_local_cron.sh --schedule "17 9 * * *"
+```
+
+Dry-run preview:
+
+```bash
+cd /Users/apple/github-projects/microdao-daarion
+bash scripts/docs/install_local_cron.sh --dry-run
+```
+
+Uninstall:
+
+```bash
+cd /Users/apple/github-projects/microdao-daarion
+bash scripts/docs/install_local_cron.sh --uninstall
+```
+
+Runner command:
+- `scripts/docs/run_docs_maintenance.sh`
+- executes `services_sync --apply` and `docs_lint`
+- does not perform any `git push`
+
 ## Safety gates
 
 - `docs_sync.sh` is dry-run by default.