feat: 初始化腾讯IM分发工具骨架，含回调分发链路与历史消息补拉

- 应用骨架: Solon + MyBatis-Plus + PostgreSQL + Redis + Sa-Token
- 核心链路: 回调网关 → 消息落库(幂等) → 分发队列(FOR UPDATE SKIP LOCKED) → worker消费/重试/死信
- 多租户隔离: 前缀法账号映射, 所有业务表带 tenant_id
- 管理后台: FreeMarker 渲染, 租户/授权/队列/用量管理页面
- 历史消息补拉: 水位线驱动, getRoamMsg/getGroupMsg 增量拉取, 兜底回调丢失
- msg_key 统一算法(回调/补拉共享, 跨路径去重)

Co-Authored-By: Claude <noreply@anthropic.com>

src/main/java/com/imutil/common/RedisConfig.java

@@ -0,0 +1,54 @@
+package com.imutil.common;
+
+import org.apache.commons.pool2.impl.GenericObjectPoolConfig;
+import org.noear.solon.annotation.Bean;
+import org.noear.solon.annotation.Configuration;
+import org.noear.solon.annotation.Inject;
+import redis.clients.jedis.Jedis;
+import redis.clients.jedis.JedisPool;
+
+/**
+ * Redis 连接池配置
+ * <p>
+ * 读取 app.yml 的 imutil.redis.* 配置，构建 JedisPool 注册为 Solon Bean。
+ * 用于限流令牌桶、映射/授权缓存、补拉水位线等高频读写场景。
+ *
+ * @author imutil
+ */
+@Configuration
+public class RedisConfig {
+
+    @Inject("${imutil.redis.host:localhost}")
+    private String host;
+
+    @Inject("${imutil.redis.port:6379}")
+    private int port;
+
+    @Inject("${imutil.redis.password:}")
+    private String password;
+
+    @Inject("${imutil.redis.database:0}")
+    private int database;
+
+    @Inject("${imutil.redis.timeout:2000}")
+    private int soTimeout;
+
+    @Inject("${imutil.redis.connectTimeout:2000}")
+    private int connectTimeout;
+
+    /**
+     * 构建 Jedis 连接池
+     */
+    @Bean
+    public JedisPool jedisPool() {
+        GenericObjectPoolConfig<Jedis> config = new GenericObjectPoolConfig<>();
+        config.setMaxTotal(16);
+        config.setMaxIdle(8);
+        config.setMinIdle(2);
+        config.setTestWhileIdle(true);
+        config.setTimeBetweenEvictionRunsMillis(30_000);
+        // 空密码兼容：Postgres/Redis 无密码场景传 null，避免鉴权失败
+        String pwd = (password == null || password.isEmpty()) ? null : password;
+        return new JedisPool(config, host, port, connectTimeout, soTimeout, pwd, database, null);
+    }
+}