feat: 添加用户错误日志功能, 禁用Redis缓存, userId自动生成5位随机字符

demo/pom.xml

@@ -115,6 +115,12 @@
 			<scope>runtime</scope>
 		</dependency>
 
+		<!-- Redis 缓存支持 -->
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-data-redis</artifactId>
+		</dependency>
+
 		<!-- PayPal SDK -->
 		<dependency>
 			<groupId>com.paypal.sdk</groupId>