refactor(cache): 缓存操作接口化，支持 Redis/Caffeine 双实现切换

将系统所有缓存操作从 `RedisUtil` 迁移至 `CacheOperations` 接口，
通过 `gym.cache.type` 配置选择 Redis 或 Caffeine 实现。

变更内容：
- 新增 CacheOperations 接口，定义 get/set/delete/hasKey/expire/deleteByPattern 等标准方法
- 新增 RedisCacheOperations 实现（基于 ReactiveRedisTemplate，默认实现）
- 新增 CaffeineCacheOperations 实现（基于 Caffeine 本地缓存）
- 新增 CacheProperties 配置类，支持 Caffeine 容量/过期等参数配置
- 新增 CacheAutoConfiguration 自动装配，通过 AutoConfiguration.imports 注册
- 全系统 17 个业务服务 + 18 个测试文件从 RedisUtil 迁移至 CacheOperations
- manage-gateway 配置 caffeine 实现（无需 Redis），manage-app 配置 redis 实现
- 分布式锁等 Redis 独有特性保持直接使用 ReactiveRedisTemplate

测试：202 通过，0 失败，0 错误

gym-manage-api/gym-auth/src/main/java/cn/novalon/gym/manage/auth/service/impl/SmsServiceImpl.java

@@ -3,7 +3,7 @@ package cn.novalon.gym.manage.auth.service.impl;
 import cn.novalon.gym.manage.auth.config.SmsProperties;
 import cn.novalon.gym.manage.auth.service.SmsService;
 import cn.novalon.gym.manage.common.constant.RedisKeyConstants;
-import cn.novalon.gym.manage.common.util.RedisUtil;
+import cn.novalon.gym.manage.common.cache.CacheOperations;
 import com.aliyuncs.CommonRequest;
 import com.aliyuncs.CommonResponse;
 import com.aliyuncs.DefaultAcsClient;
@@ -31,7 +31,7 @@ public class SmsServiceImpl implements SmsService {
     private static final long CODE_EXPIRE_SECONDS = 300;
 
     private final SmsProperties smsProperties;
-    private final RedisUtil redisUtil;
+    private final CacheOperations cacheOperations;
     private final ObjectMapper objectMapper;
 
     @Override
@@ -40,7 +40,7 @@ public class SmsServiceImpl implements SmsService {
 
         String rateLimitKey = RedisKeyConstants.SMS_CODE + phone + ":rate_limit";
 
-        return redisUtil.get(rateLimitKey, Long.class)
+        return cacheOperations.get(rateLimitKey, Long.class)
                 .defaultIfEmpty(0L)
                 .flatMap(lastSendTime -> {
                     long currentTime = LocalDateTime.now().toEpochSecond(ZoneOffset.UTC);
@@ -97,7 +97,7 @@ public class SmsServiceImpl implements SmsService {
                                     if (verifyCodeNode != null) {
                                         String verifyCode = verifyCodeNode.asText();
                                         String smsCodeKey = RedisKeyConstants.SMS_CODE + phone;
-                                        redisUtil.setWithExpire(smsCodeKey, verifyCode, CODE_EXPIRE_SECONDS).subscribe();
+                                        cacheOperations.setWithExpire(smsCodeKey, verifyCode, CODE_EXPIRE_SECONDS).subscribe();
                                         log.info("验证码已存入Redis, phone: {}, key: {}, expire: {}秒", phone, smsCodeKey, CODE_EXPIRE_SECONDS);
                                     } else {
                                         log.warn("响应中未找到Model.VerifyCode字段, 原始响应: {}", responseData);
@@ -106,7 +106,7 @@ public class SmsServiceImpl implements SmsService {
                                     log.warn("响应中未找到Model字段, 原始响应: {}", responseData);
                                 }
 
-                                redisUtil.setWithExpire(rateLimitKey, currentTime, SEND_INTERVAL_SECONDS).subscribe();
+                                cacheOperations.setWithExpire(rateLimitKey, currentTime, SEND_INTERVAL_SECONDS).subscribe();
                                 return true;
                             }
 
@@ -180,7 +180,7 @@ public class SmsServiceImpl implements SmsService {
     public Mono<String> getVerificationCode(String phone) {
         try {
             String cacheKey = RedisKeyConstants.SMS_CODE + phone;
-            return redisUtil.get(cacheKey, String.class);
+            return cacheOperations.get(cacheKey, String.class);
         } catch (Exception e) {
             log.error("获取验证码异常, phone: {}", phone, e);
             return Mono.empty();