fix: 新增定时任务，饱和度。

intc-modules/intc-iot/src/main/java/com/intc/iot/task/DeviceSaturaHighWarnTask.java

@@ -0,0 +1,80 @@
+package com.intc.iot.task;
+
+import com.intc.common.redis.utils.RedisUtils;
+import com.intc.iot.config.AliyunIotProperties;
+import com.intc.iot.handler.DeviceDataHandler;
+import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnBean;
+import org.springframework.scheduling.annotation.Scheduled;
+import org.springframework.stereotype.Component;
+
+import java.time.LocalDateTime;
+import java.time.format.DateTimeFormatter;
+import java.util.Collection;
+
+/**
+ * 夜间溶解氧饱和度持续超阈告警延迟触发定时任务
+ * 对应 C# UpdateDataSecondlyJob.CheckWarnAndNotice 中对 SaturaHigh WarnWait 的处理：
+ * 夜间（20:00-08:00）饱和度 >= 200% 持续超过配置的 saturability-warn-hours 小时才真正触发告警。
+ *
+ * @author intc-iot
+ */
+@Slf4j
+@Component
+@RequiredArgsConstructor
+@ConditionalOnBean(DeviceDataHandler.class)
+public class DeviceSaturaHighWarnTask {
+
+    private static final String SATURA_WAIT_KEY_PREFIX = "device:satura:wait:";
+
+    private static final DateTimeFormatter FORMATTER = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss");
+
+    private final DeviceDataHandler deviceDataHandler;
+
+    private final AliyunIotProperties aliyunIotProperties;
+
+    /**
+     * 每分钟扫描一次饱和度超阈等待标记
+     * 对超过配置的 saturability-warn-hours 小时的设备触发告警
+     */
+    @Scheduled(fixedDelay = 60000)
+    public void checkSaturaWaitAndTrigger() {
+        try {
+            Collection<String> keys = RedisUtils.keys(SATURA_WAIT_KEY_PREFIX + "*");
+            if (keys == null || keys.isEmpty()) {
+                return;
+            }
+
+            LocalDateTime now = LocalDateTime.now();
+            int warnHours = aliyunIotProperties.getSaturabilityWarnHours();
+
+            for (String key : keys) {
+                try {
+                    String firstExceedTimeStr = RedisUtils.getCacheObject(key);
+                    if (firstExceedTimeStr == null) {
+                        continue;
+                    }
+
+                    LocalDateTime firstExceedTime = LocalDateTime.parse(firstExceedTimeStr, FORMATTER);
+                    long elapsedHours = java.time.Duration.between(firstExceedTime, now).toHours();
+
+                    if (elapsedHours >= warnHours) {
+                        // 提取 deviceName（去掉前缀）
+                        String deviceName = key.substring(SATURA_WAIT_KEY_PREFIX.length());
+
+                        // 触发告警前先删除标记，防止重复触发
+                        RedisUtils.deleteObject(key);
+
+                        log.info("[饱和度告警] 设备夜间饱和度持续超阈已达 {} 小时，触发告警: {}", elapsedHours, deviceName);
+                        deviceDataHandler.triggerSaturaHighAlarm(deviceName);
+                    }
+                } catch (Exception e) {
+                    log.error("[饱和度告警] 处理单条等待标记异常，key={}: {}", key, e.getMessage(), e);
+                }
+            }
+        } catch (Exception e) {
+            log.error("[饱和度告警] 扫描等待标记异常: {}", e.getMessage(), e);
+        }
+    }
+}