update retention policy to a maximum of 2 days for completed archives and adjust related configurations

tests/test_database.py

@@ -1,5 +1,7 @@
 from __future__ import annotations
 
+from datetime import datetime, timedelta
+
 from app.db import Database
 
 
@@ -62,12 +64,15 @@ def test_sqlite_lease_claims_one_queued_job(tmp_path) -> None:
             "files_written": 1,
         },
         warnings=[],
-        retention_days=1,
+        retention_days=30,
     )
     ready = database.get_job(job["id"])
     assert ready is not None
     assert ready["state"] == "ready"
     assert ready["expires_at"] > ready["completed_at"]
+    expires_at = datetime.fromisoformat(ready["expires_at"])
+    completed_at = datetime.fromisoformat(ready["completed_at"])
+    assert expires_at - completed_at <= timedelta(days=2)
 
 
 def test_worker_cannot_cancel_without_a_user_cancellation_request(tmp_path) -> None: