fix(km): 修復 KM 寫入全為 unknown 的根因 (三個節點)

Bug-A: approval_execution.py 呼叫不存在的 get_incident() → AttributeError
被 except 吞掉 → alertname/alert_category/affected_services 全用預設值
修復: 改用 get_from_working_memory() + get_from_episodic_memory() 雙路徑

Bug-B: _record_to_incident() 從 PG 還原 Incident 時漏掉
notification_type + alert_category 欄位 → km_conversion 讀到 None
修復: 加入這兩個欄位的還原

Bug-C: main.py working_memory_warmup 重建 Incident 時同樣遺漏
notification_type + alert_category
修復: 同步補上

2026-04-15 Claude Sonnet 4.6 Asia/Taipei

apps/api/src/main.py

@@ -276,6 +276,9 @@ async def lifespan(_app: FastAPI) -> AsyncGenerator[None, None]:
                     closed_at=record.closed_at,
                     ttl_days=record.ttl_days,
                     vectorized=record.vectorized,
+                    # ADR-073: 分類欄位必須還原，否則 KM 寫入時全為 "unknown"
+                    notification_type=record.notification_type,
+                    alert_category=record.alert_category,
                 )
                 if await incident_service.save_to_working_memory(incident):
                     restored += 1