feat: 添加设备冷却逻辑，过滤冷却期内设备并处理冷却队列

src/main/java/com/gameplatform/server/task/MachineCooldownCleanupTask.java

@@ -0,0 +1,43 @@
+package com.gameplatform.server.task;
+
+import com.gameplatform.server.service.cooldown.MachineCooldownService;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.scheduling.annotation.Scheduled;
+import org.springframework.stereotype.Component;
+
+/**
+ * 机器冷却清理任务
+ * 定期清理过期的机器冷却记录以释放内存
+ */
+@Component
+public class MachineCooldownCleanupTask {
+    private static final Logger log = LoggerFactory.getLogger(MachineCooldownCleanupTask.class);
+
+    private final MachineCooldownService machineCooldownService;
+
+    public MachineCooldownCleanupTask(MachineCooldownService machineCooldownService) {
+        this.machineCooldownService = machineCooldownService;
+    }
+
+    /**
+     * 每30分钟清理一次过期的冷却记录
+     */
+    @Scheduled(fixedRate = 30 * 60 * 1000) // 30分钟
+    public void cleanupExpiredCooldowns() {
+        try {
+            int sizeBefore = machineCooldownService.getCooldownQueueSize();
+            machineCooldownService.cleanupExpiredCooldowns();
+            int sizeAfter = machineCooldownService.getCooldownQueueSize();
+            
+            if (sizeBefore != sizeAfter) {
+                log.info("机器冷却记录清理完成: 清理前{}个，清理后{}个，清理了{}个过期记录", 
+                        sizeBefore, sizeAfter, sizeBefore - sizeAfter);
+            } else {
+                log.debug("机器冷却记录清理完成: 无过期记录需要清理，当前记录数{}", sizeAfter);
+            }
+        } catch (Exception e) {
+            log.error("机器冷却记录清理失败: {}", e.getMessage(), e);
+        }
+    }
+}