fix(aiops): ADR-092 三修 — Playbook enum崩潰 + Telegram永久靜默 + 採納失敗 + AI自健診

B1 playbook_service.py: evolver setattr傳str而非PlaybookStatus enum
  → _pg_upsert playbook.status.value炸（163次/48h），修：update_with_validation強制enum轉型

B2 approval_db.py + webhooks.py: find_by_fingerprint PENDING誤收斂
  → PENDING≠Telegram已發；修：成功push後mark tg_sent:{fingerprint} Redis(24h TTL)
  → find_by_fingerprint debounce窗外PENDING必須Redis確認才收斂

drift_adopt_service.py: telegram_gateway呼叫adopt_drift(report_id)但方法不存在
  → 新增adopt_drift()包裝：從DB載入DriftReport後委派adopt()，修復採納失敗

B3 ai_slo_watchdog_job.py + main.py: AI無法感知自身故障（MASTER §1.1盲區）
  → 新增每15分鐘自健診：W-1 SLO違反 W-2 TG靜默偵測 W-3 飛輪成功率
  → 任一異常→TYPE-8M send_meta_alert；Redis去重1h

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

apps/api/src/main.py

@@ -536,6 +536,15 @@ async def lifespan(_app: FastAPI) -> AsyncGenerator[None, None]:
     except Exception as e:
         logger.warning("offline_replay_loop_schedule_failed", error=str(e))
 
+    # ADR-092 (2026-04-20 ogt + Claude Opus 4.7): AI SLO Watchdog — 每 15 分鐘自健診
+    # MASTER §1.1：系統必須能感知自身故障，W-1 SLO + W-2 Telegram靜默 + W-3 飛輪成功率
+    try:
+        from src.jobs.ai_slo_watchdog_job import run_ai_slo_watchdog_loop
+        asyncio.create_task(run_ai_slo_watchdog_loop())
+        logger.info("ai_slo_watchdog_scheduled", interval_sec=900)
+    except Exception as e:
+        logger.warning("ai_slo_watchdog_schedule_failed", error=str(e))
+
     yield
 
     # Shutdown