fix: add raise_for_status to expose real LLM HTTP errors

cfc-langgraph/app/agents/report_parse_agent.py

@@ -83,6 +83,7 @@ class ReportParseAgent:
                         },
                         headers={"Authorization": f"Bearer {self.llm_api_key}"},
                     )
+                    resp.raise_for_status()
                     data = resp.json()
                     content = data['choices'][0]['message']['content']
                     content = content.replace('```json', '').replace('```', '').strip()