A 68-year-old female, recently admitted to a busy internal medicine ward at a teaching hospital in Halifax for community-acquired pneumonia, has been receiving standard antibiotic therapy for 72 hours. While her general condition has improved, a PGY-2 Family Medicine resident covering the ward notes a persistent low-grade fever (37.90C) and a subtle increase in oxygen requirements over the last 12 hours, now needing 2 litres/minute via nasal cannula compared to room air on admission. The resident also observes that her C-reactive protein (CRP) has not significantly trended downwards since admission. The attending internist, during morning rounds, reviews the patient's chart briefly and, despite the resident's expressed reservation about the persistent fever and oxygen need, decides the patient is stable for discharge to free up a bed, stating, 'Elderly patients often take a bit longer to bounce back; she'll be fine at home.' The resident feels strongly that an early discharge carries a significant risk of readmission or clinical deterioration. In accordance with ethical principles in medical practice, what is the most appropriate next step for the resident?