fix(release): keep large snapshots attached and low impact

backend/tests/test_rc5_release_deployment.py

@@ -53,6 +53,20 @@ def test_release_creates_verified_backup_before_candidate_migrations() -> None:
     assert "preflight_backup_capacity" in script
     assert "select_verified_link_dest" in script
     assert "release_backup_snapshot.py" in script
+    assert "run_low_impact()" in script
+    assert "ionice -c 2 -n 7" in script
+    assert "nice -n 10" in script
+    assert "run_low_impact bash scripts/backup_release_state.sh" in script
+    assert "run_low_impact bash scripts/verify_release_backup.sh" in script
+
+
+def test_gitea_deploy_waits_for_the_mandatory_large_snapshot() -> None:
+    workflow = (ROOT / ".gitea" / "workflows" / "release-gates.yml").read_text(encoding="utf-8")
+
+    assert "cancel-in-progress: false" in workflow
+    deploy_job = workflow.split("\n  deploy:\n", maxsplit=1)[1]
+    assert "timeout-minutes: 720" in deploy_job
+    assert "docker exec gitea-deploy-control" in deploy_job
 
 
 def test_release_starts_only_the_locally_attested_ai_image() -> None: