A 72-year-old woman with a history of myocardial infarction 3 months ago (treated with PCI and stenting), chronic stable angina on triple antianginal therapy (atenolol, amlodipine, isosorbide mononitrate), and COPD (on inhaled bronchodilators, FEV₁ 55% predicted) presents for emergency repair of a perforated peptic ulcer. Blood pressure is 110/70 mmHg, heart rate 88 bpm, respiratory rate 22/min. Recent troponin is normal. She reports dyspnea on exertion (stairs) but denies rest angina. What is her ASA Physical Status classification?