fix(HEL-461): 切换事务失败写入 release-group 审计日志

整组切换中断时除回滚与废弃批次外，同步记录
action=release-group 的失败审计，便于后台追踪。

Co-authored-by: Cursor <cursoragent@cursor.com>
Co-authored-by: multica-agent <github@multica.ai>

xiaobai-datahub/tests/test_atomic_release.py

@@ -184,6 +184,13 @@ class ReleaseGroupSwitchTests(unittest.TestCase):
         for table in ("eod_bars", "eod_valuation", "eod_moneyflow", "eod_auction", "eod_stocks"):
             rows = self.db.fetchall(f"SELECT * FROM {table} WHERE trade_date = ?", (TRADE_DATE,))
             self.assertEqual(rows, [], table)
+        audit = self.db.fetchone(
+            "SELECT * FROM audit_log WHERE action = 'release-group' ORDER BY id DESC"
+        )
+        self.assertIsNotNone(audit)
+        detail = str(audit["detail"])
+        self.assertIn("killed mid-switch", detail)
+        self.assertIn("failed", detail)
 
     def test_duplicate_runs_are_idempotent(self) -> None:
         self.pipe.run_eod_batch_a(TRADE_DATE)
@@ -389,6 +396,12 @@ class ForceBoundaryEntryTests(unittest.TestCase):
         self.assertIn("killed mid-switch", ctx.exception.message)
         # previous complete A/B versions keep serving
         self.assertEqual(publications_map(self.db, TRADE_DATE), before)
+        audit = self.db.fetchone(
+            "SELECT * FROM audit_log WHERE action = 'release-group' ORDER BY id DESC"
+        )
+        self.assertIsNotNone(audit)
+        self.assertIn("failed", str(audit["detail"]))
+        self.assertIn("killed mid-switch", str(audit["detail"]))
 
 
 if __name__ == "__main__":