Hard local maintenance: VACUUM + WAL checkpoint on every retention/forget execute

tests/test_maintenance.py

@@ -100,4 +100,5 @@ def test_scheduled_pass_cleans_old_and_reports(maint_env):
     conn.close()
     result = asyncio.run(maintenance.run_scheduled_pass(svc, "test-scheduled"))
     assert result["versions_deleted"] == 1
+    assert result["index_reclaimed"]["freelist_after"] == 0
     assert len(history(client, project / "main.py")) == 2

tests/test_recovery.py

@@ -151,6 +151,7 @@ def test_retention_thins_old_keeps_five_days(rec_env):
     assert dry["dry_run"] and dry["versions_to_delete"] == 1  # 3 old minus pinned minus daily-kept
     done = client.post("/api/v1/admin/retention/run", json={"dry_run": False}).json()
     assert done["versions_deleted"] == 1
+    assert done["index_reclaimed"]["freelist_after"] == 0  # hard delete, not freelist bloat
     remaining = history(client, project / "main.py")
     assert len(remaining) == 4  # latest + pinned + one-per-day + fresh middle
     assert remaining[0]["pinned"] == 0  # newest still the newest