feat: 落地聊天记录异步持久化基础设施

- 新增 chatlog 模块、AnalyticalDB 公共层与 common-mq Redis Streams 实现

- 建立 Redis 热态、MySQL 热数据、AnalyticalDB 历史查询与同步链路

- 收紧聊天记录幂等、摘要时序与持久化失败语义

easyflow-modules/easyflow-module-chatlog/src/test/java/tech/easyflow/chatlog/support/ChatTableRouterTest.java

@@ -0,0 +1,21 @@
+package tech.easyflow.chatlog.support;
+
+import org.junit.Assert;
+import org.junit.Test;
+
+import java.time.YearMonth;
+
+public class ChatTableRouterTest {
+
+    private final ChatTableRouter router = new ChatTableRouter();
+
+    @Test
+    public void shouldResolveSessionTable() {
+        Assert.assertEquals("chat_session", router.resolveSessionTable());
+    }
+
+    @Test
+    public void shouldResolveMonthLogTable() {
+        Assert.assertEquals("chat_log_202604", router.resolveLogTable(YearMonth.of(2026, 4)));
+    }
+}