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feat(monitoring): Phase 20 Nemotron 完整監控整合
服務註冊表:
- 新增 nvidia-nemotron AI 服務
- 3 個 Prometheus metrics 定義
- 4 個告警規則 (circuit_breaker, timeout, error_rate, rate_limit)
- fallback 策略 (nvidia → gemini → ollama)
Alertmanager 規則:
- NvidiaCircuitBreakerOpen (P1)
- NvidiaToolCallingHighLatency (P2)
- NvidiaToolCallingHighErrorRate (P0)
- NvidiaCircuitBreakerHalfOpen (Info)
- NvidiaCircuitBreakerClosed (Info)
- NvidiaNoRequests (P3)
自動修復:
- fallback_to_gemini
- fallback_to_ollama
- switch_model
ADR: ADR-036
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>