fix(memory): ReflectionUtil 添加 SoftReference + TTL 缓存清理

原代码使用永久缓存 Reflections 实例，占用大量内存且不释放。

改为:
- 使用 SoftReference 允许 GC 在内存不足时回收
- 添加 1 小时 TTL 防止长期占用
- 每次获取时自动清理过期条目

core/src/main/java/cn/qaiu/vx/core/util/ReflectionUtil.java

@@ -18,12 +18,14 @@ import org.reflections.util.FilterBuilder;
 
 import java.lang.annotation.Annotation;
 import java.lang.invoke.MethodHandles;
+import java.lang.ref.SoftReference;
 import java.lang.reflect.Array;
 import java.lang.reflect.InvocationTargetException;
 import java.lang.reflect.Method;
 import java.net.URL;
 import java.text.ParseException;
 import java.util.*;
+import java.util.concurrent.TimeUnit;
 
 import static cn.qaiu.vx.core.util.ConfigConstant.BASE_LOCATIONS;
 
@@ -37,7 +39,26 @@ import static cn.qaiu.vx.core.util.ConfigConstant.BASE_LOCATIONS;
 public final class ReflectionUtil {
 
     // 缓存Reflections实例，避免重复扫描（每次扫描约35K+值，耗时1-3秒，占用大量内存）
-    private static final Map<String, Reflections> REFLECTIONS_CACHE = new java.util.concurrent.ConcurrentHashMap<>();
+    // 使用 SoftReference 允许 GC 在内存不足时回收，同时添加 TTL 防止长期占用
+    private static final Map<String, SoftReference<Reflections>> REFLECTIONS_CACHE = new java.util.concurrent.ConcurrentHashMap<>();
+    private static final long CACHE_TTL_MS = TimeUnit.HOURS.toMillis(1); // 1小时 TTL
+    private static final Map<String, Long> CACHE_TIMESTAMP = new java.util.concurrent.ConcurrentHashMap<>();
+
+    /**
+     * 清理过期的缓存条目
+     */
+    private static void cleanExpiredCache() {
+        long now = System.currentTimeMillis();
+        Iterator<Map.Entry<String, Long>> iterator = CACHE_TIMESTAMP.entrySet().iterator();
+        while (iterator.hasNext()) {
+            Map.Entry<String, Long> entry = iterator.next();
+            if (now - entry.getValue() > CACHE_TTL_MS) {
+                String key = entry.getKey();
+                REFLECTIONS_CACHE.remove(key);
+                iterator.remove();
+            }
+        }
+    }
 
     /**
      * 以默认配置的基础包路径获取反射器
@@ -49,34 +70,50 @@ public final class ReflectionUtil {
     }
 
     /**
-     * 获取反射器（带缓存）
+     * 获取反射器（带缓存，支持 TTL 和 SoftReference）
      *
      * @param packageAddress Package address String
      * @return Reflections object
      */
     public static Reflections getReflections(String packageAddress) {
-        return REFLECTIONS_CACHE.computeIfAbsent(packageAddress, key -> {
-            List<String> packageAddressList;
-            if (key.contains(",")) {
-                packageAddressList = Arrays.asList(key.split(","));
-            } else if (key.contains(";")) {
-                packageAddressList = Arrays.asList(key.split(";"));
-            } else {
-                packageAddressList = Collections.singletonList(key);
-            }
-            return createReflections(packageAddressList);
-        });
+        cleanExpiredCache();
+        SoftReference<Reflections> ref = REFLECTIONS_CACHE.get(packageAddress);
+        Reflections reflections = ref != null ? ref.get() : null;
+        if (reflections != null) {
+            return reflections;
+        }
+        List<String> packageAddressList;
+        if (packageAddress.contains(",")) {
+            packageAddressList = Arrays.asList(packageAddress.split(","));
+        } else if (packageAddress.contains(";")) {
+            packageAddressList = Arrays.asList(packageAddress.split(";"));
+        } else {
+            packageAddressList = Collections.singletonList(packageAddress);
+        }
+        reflections = createReflections(packageAddressList);
+        REFLECTIONS_CACHE.put(packageAddress, new SoftReference<>(reflections));
+        CACHE_TIMESTAMP.put(packageAddress, System.currentTimeMillis());
+        return reflections;
     }
 
     /**
-     * 获取反射器（带缓存）
+     * 获取反射器（带缓存，支持 TTL 和 SoftReference）
      *
      * @param packageAddresses Package address List
      * @return Reflections object
      */
     public static Reflections getReflections(List<String> packageAddresses) {
+        cleanExpiredCache();
         String cacheKey = String.join(",", packageAddresses);
-        return REFLECTIONS_CACHE.computeIfAbsent(cacheKey, key -> createReflections(packageAddresses));
+        SoftReference<Reflections> ref = REFLECTIONS_CACHE.get(cacheKey);
+        Reflections reflections = ref != null ? ref.get() : null;
+        if (reflections != null) {
+            return reflections;
+        }
+        reflections = createReflections(packageAddresses);
+        REFLECTIONS_CACHE.put(cacheKey, new SoftReference<>(reflections));
+        CACHE_TIMESTAMP.put(cacheKey, System.currentTimeMillis());
+        return reflections;
     }
 
     private static Reflections createReflections(List<String> packageAddresses) {