feat(flywheel): Phase 4 — KM conversion hook + daily vectorize cron

ADR-073 Phase 4-2: incident_service.resolve_incident() KM conversion hook
- resolve 時 fire-and-forget KMConversionService.convert(incident)
- 已解決的 Incident 自動轉換為結構化 KM 條目，完成飛輪「學習固化」節點
- KMConversionService (Phase 4-1) 已存在 (km_conversion_service.py, 336 lines)

ADR-073 Phase 4-3: 15-cronjob-km-vectorize.yaml
- 每日 03:00 台北時間呼叫 /api/v1/knowledge/embed-all
- 自動向量化當日新增 KM 條目，確保 RAG 查詢不遺漏新知識
- 加入 kustomization.yaml resources

Phase 4-4: handle_callback log_manual_fix 已存在 (telegram_gateway.py:2468)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

apps/api/src/services/incident_service.py

@@ -836,6 +836,17 @@ class IncidentService:
         except Exception:
             logger.exception("kb_extract_task_create_failed", incident_id=incident_id)
 
+        # ADR-073 Phase 4-2: resolve 時觸發 KM conversion (2026-04-12 ogt)
+        # 將已解決的 Incident 轉換為結構化 KM 條目，驅動飛輪學習固化節點
+        try:
+            import asyncio
+            from src.services.km_conversion_service import get_km_conversion_service
+            asyncio.create_task(
+                get_km_conversion_service().convert(incident)
+            )
+        except Exception:
+            logger.exception("km_conversion_task_create_failed", incident_id=incident_id)
+
         # 2026-04-07 Claude Code: Sprint 4 B4 — 手動處理推斷
         # I1+S1 Fix: 委託 derive_key_from_incident() 統一推導
         try: