feat(api): 重開機後自動 warm-up Redis Working Memory from PostgreSQL

- main.py lifespan: 啟動時從 DB restore INVESTIGATING/MITIGATING incidents
- scripts/reboot-recovery: 188 + 110 自動化腳本 + systemd services
- scripts/reboot-recovery: aiops-network 自動建立 (ClawBot 依賴)
- docs/runbooks/REBOOT-RECOVERY-SOP.md: 完整改寫，含自動化腳本說明

Why: 重開機後 Redis 清空導致前端 incidents 顯示 0 筆（DB 完整保存）
統帥批准: 「所有數據必須被長久記錄下來」

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

apps/api/src/main.py

@@ -229,6 +229,50 @@ async def lifespan(_app: FastAPI) -> AsyncGenerator[None, None]:
         )
         logger.info("telegram_heartbeat_monitor_started")
 
+    # Reboot Recovery: Warm-up Redis Working Memory from PostgreSQL
+    # 2026-04-05 ogt: 重開機後 Redis 清空，從 DB restore 未解決的 incidents
+    # 統帥批准: 數據必須長久記錄，重開機後自動恢復 Working Memory
+    try:
+        from src.services.incident_service import get_incident_service
+        from src.db.base import get_db_context
+        from src.db.models import IncidentRecord
+        from sqlalchemy import select
+
+        incident_service = get_incident_service()
+        async with get_db_context() as db:
+            result = await db.execute(
+                select(IncidentRecord).where(
+                    IncidentRecord.status.in_(["investigating", "mitigating"])
+                )
+            )
+            records = result.scalars().all()
+
+        restored = 0
+        for record in records:
+            from src.models.incident import Incident
+            incident = Incident(
+                incident_id=record.incident_id,
+                status=record.status,
+                severity=record.severity,
+                signals=record.signals or [],
+                affected_services=record.affected_services or [],
+                decision_chain=record.decision_chain,
+                proposal_ids=record.proposal_ids or [],
+                outcome=record.outcome,
+                created_at=record.created_at,
+                updated_at=record.updated_at,
+                resolved_at=record.resolved_at,
+                closed_at=record.closed_at,
+                ttl_days=record.ttl_days,
+                vectorized=record.vectorized,
+            )
+            if await incident_service.save_to_working_memory(incident):
+                restored += 1
+
+        logger.info("working_memory_warmed_up", restored=restored, total=len(records))
+    except Exception as e:
+        logger.warning("working_memory_warmup_failed", error=str(e))
+
     # Phase 6.1: 啟動 Signal Worker (Redis Streams Consumer)
     # 統帥鐵律: Event Bus 解耦告警接收與處理
     await init_signal_worker()