#pragma once
#include <cstdint>
#include <string>

struct Reading { std::string channel; double celsius; std::int64_t timestamp_ms; };
enum class ChannelState { Healthy, Stale, OutOfRange };
struct ChannelAssessment { Reading reading; ChannelState state; };
ChannelAssessment assess_channel(const Reading& reading, std::int64_t now_ms);