Python 및 FastAPI 구조적 로깅

@app.middleware("http")
async def record_request(request, call_next):
    started_at = time.perf_counter()
    response = await call_next(request)
    route = request.scope.get("route")

    await telemetry.log("api_request_completed", {
        "route_template": getattr(route, "path", "unmatched"),
        "method": request.method,
        "status_code": response.status_code,
        "status": "failed" if response.status_code >= 500 else "success",
        "latency_ms": round((time.perf_counter() - started_at) * 1000),
        "request_id": request.headers.get("x-request-id"),
    })
    return response