feat: C2 Redis 接入 + 接口限流（RedisService + @RateLimit，验证码/登录防刷）

fruitshorts-framework/pom.xml

@@ -66,5 +66,19 @@
             <groupId>org.springdoc</groupId>
             <artifactId>springdoc-openapi-starter-webmvc-ui</artifactId>
         </dependency>
+
+        <!-- 监控：暴露 actuator 指标供 Prometheus 抓取 -->
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-actuator</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>io.micrometer</groupId>
+            <artifactId>micrometer-registry-prometheus</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-data-redis</artifactId>
+        </dependency>
     </dependencies>
 </project>