refactor: 统一实体/限流AOP化/精简日志/文件归位

src/main/java/com/youlai/boot/common/annotation/RateLimit.java

@@ -0,0 +1,22 @@
+package com.youlai.boot.common.annotation;
+
+import java.lang.annotation.*;
+import java.util.concurrent.TimeUnit;
+
+/**
+ * 接口限流
+ * <p>标注在 Controller 方法上，基于 Redis 计数窗口实现</p>
+ */
+@Target(ElementType.METHOD)
+@Retention(RetentionPolicy.RUNTIME)
+@Documented
+public @interface RateLimit {
+
+    int limit() default 0;
+
+    int window() default 0;
+
+    TimeUnit timeUnit() default TimeUnit.SECONDS;
+
+    String prefix() default "rate_limit:";
+}