fix: 太阳能控制下发指令，自测bug修复。

intc-modules/intc-iot/src/main/java/com/intc/iot/handler/DeviceDataHandler.java

@@ -63,6 +63,7 @@ import java.util.concurrent.TimeUnit;
 public class DeviceDataHandler {
 
     public static final String PENDING_SOLAR_PROPERTY_KEY_PREFIX = "device:pending:solar:property:";
+    private static final String PENDING_SOLAR_PROPERTY_FLUSH_LOCK_PREFIX = "device:pending:solar:property:flush:";
     private static final int DEVICE_TYPE_SOLAR_CONTROLLER = 3;
 
     /**
@@ -1011,8 +1012,23 @@ public class DeviceDataHandler {
                 deviceName, device.getId(), device.getDeviceType());
             return;
         }
+        if (StrUtil.isBlank(device.getSerialNum())) {
+            log.debug("[太阳能属性] 上线设备编号为空，跳过补发: deviceName={}, deviceId={}, iotId={}",
+                deviceName, device.getId(), device.getIotId());
+            return;
+        }
+
+        String flushLockKey = PENDING_SOLAR_PROPERTY_FLUSH_LOCK_PREFIX + device.getSerialNum();
+        boolean locked = false;
 
         try {
+            locked = RedisUtils.setObjectIfAbsent(flushLockKey, "1", Duration.ofSeconds(30));
+            if (!locked) {
+                log.debug("[太阳能属性] 已有补发任务执行中，跳过重复补发: deviceName={}, deviceId={}",
+                    deviceName, device.getId());
+                return;
+            }
+
             PendingSolarProperty pendingProperty = findPendingSolarProperty(device);
             if (pendingProperty == null) {
                 logNoPendingSolarProperty(trigger, deviceName, device);
@@ -1047,6 +1063,15 @@ public class DeviceDataHandler {
                 trigger, deviceName, pendingProperty.redisKey, pendingProperty.deviceId, pendingProperty.properties);
         } catch (Exception e) {
             log.error("[太阳能属性] {}补发异常: deviceName={}, err={}", trigger, deviceName, e.getMessage(), e);
+        } finally {
+            if (locked) {
+                try {
+                    RedisUtils.deleteObject(flushLockKey);
+                } catch (Exception e) {
+                    log.warn("[太阳能属性] 释放补发锁失败: deviceName={}, lockKey={}, err={}",
+                        deviceName, flushLockKey, e.getMessage());
+                }
+            }
         }
     }