Add outbox worker processing policy

docs/test_instance_post_import.md

@@ -149,7 +149,35 @@ Helpdesk behavior, checks the matching `event_outbox_events` rows, and dry-runs
 worker enrichment without claiming or marking rows processed. Details are in
 `docs/helpdesk_outbox_worker_validation.md`.
 
-## 9. Re-Run The Read-Only Validator
+## 9. Check Or Process The Outbox Worker
+
+Inspect outbox queue state:
+
+```sh
+./redmine_outbox_worker.py --status
+```
+
+Preview worker output without marking rows processed:
+
+```sh
+./redmine_outbox_worker.py --dry-run --batch-size 10
+```
+
+Process a small bounded batch only after the dry-run output looks correct:
+
+```sh
+./redmine_outbox_worker.py --batch-size 5
+```
+
+The default JSONL output path is
+`/tmp/redmine-outbox/derived_documents.jsonl`. Use `--output` to override it.
+Processed rows are retained by default. To preview test-instance cleanup:
+
+```sh
+./redmine_outbox_worker.py --purge-processed-days 30
+```
+
+## 10. Re-Run The Read-Only Validator
 
 Finish by running: