feat(event): add daily cleanup for delivered/dead-letter events

channel-service/tests/test_event_store.py

@@ -1,5 +1,6 @@
 import os
 import tempfile
+from datetime import datetime, timedelta, timezone
 
 import pytest
 
@@ -40,3 +41,19 @@ def test_mark_delivered(store):
     store.mark_delivered(event.event_id)
     pending = store.fetch_pending(limit=10)
     assert len(pending) == 0
+
+
+def test_cleanup_old_delivered_events(store):
+    old_event = OutboundEvent(EventType.HEARTBEAT, "bot-001", "rescue", {})
+    store.save(old_event)
+    store.mark_delivered(old_event.event_id)
+
+    # Modify created_at to be 11 days ago.
+    with store._connection() as conn:
+        conn.execute(
+            "UPDATE outbound_events SET created_at = ? WHERE id = ?",
+            (datetime.now(timezone.utc) - timedelta(days=11), old_event.event_id),
+        )
+
+    deleted = store.cleanup(10)
+    assert deleted == 1