fix(monitoring): 合併重複飛輪告警 group + 補 notification_type: TYPE-8M

awoooi_flywheel_health (重複) 合入 awoooi_flywheel_meta_alerts:
- 所有 5 條規則加 notification_type: TYPE-8M
- 新增 FlywheelAlertnameNullHigh（原僅在舊 group）
- 刪除重複 group，消除 Prometheus 同名告警衝突

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

ops/monitoring/alerts-unified.yml

@@ -755,9 +755,11 @@ groups:
           team: aiops
           auto_repair: "false"
           alert_category: flywheel_health
+          notification_type: TYPE-8M
         annotations:
           summary: "飛輪 Playbook 數量為零，AI 修復完全依賴 LLM"
           description: "Redis 中無任何已批准 Playbook，自動修復能力大幅降低"
+          runbook: "執行 scripts/cold_start_playbooks.py 冷啟動"
       - alert: FlywheelExecutionSuccessLow
         expr: awoooi_flywheel_execution_success_rate < 0.1
         for: 2h
@@ -767,9 +769,11 @@ groups:
           team: aiops
           auto_repair: "false"
           alert_category: flywheel_health
+          notification_type: TYPE-8M
         annotations:
           summary: "飛輪執行成功率 {{ $value | humanizePercentage }} 低於 10%"
           description: "連續 2 小時執行成功率不足 10%，Playbook 可能已過時"
+          runbook: "檢查 decision_manager 日誌，確認 target 解析和 SSH MCP 狀態"
       - alert: FlywheelKMVectorizationLow
         expr: awoooi_flywheel_km_unvectorized_count > 10
         for: 30m
@@ -779,91 +783,38 @@ groups:
           team: aiops
           auto_repair: "false"
           alert_category: flywheel_health
+          notification_type: TYPE-8M
         annotations:
           summary: "{{ $value }} 筆 KM 未向量化，RAG 查詢命中率下降"
           description: "knowledge_entries 中 embedding IS NULL 超過 10 筆且持續 30 分鐘"
-      - alert: FlywheelIncidentsStuck
-        expr: awoooi_flywheel_incidents_stuck > 5
-        for: 5m
-        labels:
-          severity: warning
-          layer: k8s
-          team: aiops
-          auto_repair: "false"
-          alert_category: flywheel_health
-        annotations:
-          summary: "{{ $value }} 筆 Incident 卡在 INVESTIGATING 超過 24h"
-          description: "飛輪推理匹配節點可能堵塞，需人工清理或重新觸發診斷"
-
-  # =========================================================================
-  # 飛輪健康詳細告警 (awoooi_flywheel_health) — 從主機補回 2026-04-12
-  # =========================================================================
-  - name: awoooi_flywheel_health
-    interval: 5m
-    rules:
-      - alert: FlywheelPlaybookZero
-        expr: awoooi_flywheel_playbook_count == 0
-        for: 1h
-        labels:
-          severity: critical
-          alert_category: flywheel_health
-          notification_type: TYPE-8M
-          auto_repair: "false"
-        annotations:
-          summary: "飛輪 Playbook 數量為 0"
-          description: "Playbook 數量持續 1 小時為 0，飛輪學習節點完全失效。"
-          runbook: "執行 scripts/cold_start_playbooks.py 冷啟動"
-
-      - alert: FlywheelExecutionSuccessLow
-        expr: awoooi_flywheel_execution_success_rate < 0.1
-        for: 2h
-        labels:
-          severity: warning
-          alert_category: flywheel_health
-          notification_type: TYPE-8M
-          auto_repair: "false"
-        annotations:
-          summary: "飛輪自動修復成功率低於 10%"
-          description: "執行成功率 {{ $value | humanizePercentage }}，低於健康基線 10%。"
-          runbook: "檢查 decision_manager 日誌，確認 target 解析和 SSH MCP 狀態"
-
-      - alert: FlywheelKMVectorizationLow
-        expr: awoooi_flywheel_km_unvectorized_count > 10
-        for: 30m
-        labels:
-          severity: warning
-          alert_category: flywheel_health
-          notification_type: TYPE-8M
-          auto_repair: "false"
-        annotations:
-          summary: "飛輪 KM 未向量化數量 > 10"
-          description: "{{ $value }} 筆 KM 條目尚未向量化，RAG 查詢品質下降。"
           runbook: "執行 scripts/batch_vectorize_km.py 或檢查每日 CronJob 狀態"
-
       - alert: FlywheelAlertnameNullHigh
         expr: awoooi_flywheel_alertname_null_rate > 0.05
         for: 30m
         labels:
           severity: warning
+          layer: k8s
+          team: aiops
+          auto_repair: "false"
           alert_category: flywheel_health
           notification_type: TYPE-8M
-          auto_repair: "false"
         annotations:
           summary: "飛輪 alertname NULL 率超過 5%"
           description: "alertname NULL 率 {{ $value | humanizePercentage }}，影響路由準確性。"
           runbook: "執行 scripts/backfill_alertname.py 回填"
-
       - alert: FlywheelIncidentsStuck
         expr: awoooi_flywheel_incidents_stuck > 5
         for: 10m
         labels:
           severity: warning
+          layer: k8s
+          team: aiops
+          auto_repair: "false"
           alert_category: flywheel_health
           notification_type: TYPE-8M
-          auto_repair: "false"
         annotations:
-          summary: "{{ $value }} 筆 Incident 卡在 INVESTIGATING 超過 24 小時"
-          description: "大量 Incident 未推進，可能是決策引擎或 Telegram 通知阻塞。"
+          summary: "{{ $value }} 筆 Incident 卡在 INVESTIGATING 超過 24h"
+          description: "飛輪推理匹配節點可能堵塞，需人工清理或重新觸發診斷"
 
   # =========================================================================
   # 備份還原告警 (awoooi_backup_restore) — 從主機補回 2026-04-12