- Replace api_gateway_ with api_ prefix to match actual metric exports (cockpit, observability)
- Change grpc_code!="OK" to grpc_code!="0" — gRPC uses numeric status codes (cockpit, trading)
- Update gRPC service filter to actual exported_service labels: trading-agent-service,
broker-gateway, backtesting-service, ml-training-service, data-acquisition-service (trading)
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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