feat :AIOJ 后端模块并更新项目结构

- 引入了新模块：gateway、judge service、question service、user service 和 UPMS。
- 在 gateway 和 user service 模块中创建了 package-info.java 文件用于文档说明。
- 更新了 pom.xml 文件以反映新的模块结构和依赖关系。
- 在 UserController 中实现了基本的用户资料管理端点。
- 为每个新模块添加了扁平化 POM 文件以有效管理依赖。
- 增强了项目属性，以实现更好的版本管理和模块间一致性。

pom.xml

@@ -3,18 +3,21 @@
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
     xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
     <modelVersion>4.0.0</modelVersion>
+
     <parent>
         <groupId>org.springframework.boot</groupId>
         <artifactId>spring-boot-starter-parent</artifactId>
         <version>3.5.7</version>
         <relativePath />
     </parent>
-    <groupId>cn.meowrain</groupId>
+
+    <groupId>cn.meowrain.aioj</groupId>
     <artifactId>ai-oj</artifactId>
-    <version>1.0-SNAPSHOT</version>
+    <version>${revision}</version>
     <packaging>pom</packaging>
     <name>ai-oj-microservices</name>
     <description>一款集成了AI功能的OJ判题系统</description>
+
     <modules>
         <module>aioj-backend-common</module>
         <module>aioj-backend-gateway</module>
@@ -24,51 +27,54 @@
         <module>aioj-backend-ai-service</module>
         <module>aioj-backend-auth</module>
         <module>aioj-backend-upms</module>
-        <module>aioj-backend-common/aioj-backend-common-swagger</module>
+        <module>aioj-backend-file-service</module>
     </modules>
+
     <properties>
-        <maven.compiler.source>17</maven.compiler.source>
-        <maven.compiler.target>17</maven.compiler.target>
+        <!-- ==================== 项目基础配置 ==================== -->
+        <revision>1.0.0</revision>
+        <java.version>17</java.version>
+        <maven.compiler.source>${java.version}</maven.compiler.source>
+        <maven.compiler.target>${java.version}</maven.compiler.target>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+        
+        <!-- ==================== Spring生态版本 ==================== -->
         <spring-boot.version>3.5.7</spring-boot.version>
         <spring-cloud.version>2025.0.0</spring-cloud.version>
         <spring-cloud-alibaba.version>2025.0.0.0</spring-cloud-alibaba.version>
+        
+        <!-- ==================== 构建插件版本 ==================== -->
         <spring.checkstyle.plugin>0.0.47</spring.checkstyle.plugin>
         <git.commit.plugin>9.0.2</git.commit.plugin>
+        <maven.compiler.plugin.version>3.14.1</maven.compiler.plugin.version>
+        <jib.plugin.version>3.4.5</jib.plugin.version>
+        <flatten.plugin.version>1.6.0</flatten.plugin.version>
+        
+        <!-- ==================== Docker配置 ==================== -->
         <docker.spring.active>dev</docker.spring.active>
     </properties>
+
+    <!-- 全局依赖：所有子模块都会继承 -->
     <dependencies>
-        <dependency>
-            <groupId>org.springframework.boot</groupId>
-            <artifactId>spring-boot-starter-aop</artifactId>
-        </dependency>
-        <!-- https://mvnrepository.com/artifact/org.apache.commons/commons-lang3 -->
-        <dependency>
-            <groupId>org.apache.commons</groupId>
-            <artifactId>commons-lang3</artifactId>
-        </dependency>
-        <dependency>
-            <groupId>com.google.code.gson</groupId>
-            <artifactId>gson</artifactId>
-            <version>2.9.1</version>
-        </dependency>
         <dependency>
             <groupId>org.projectlombok</groupId>
             <artifactId>lombok</artifactId>
             <optional>true</optional>
         </dependency>
     </dependencies>
+
     <dependencyManagement>
         <dependencies>
+            <!-- AIOJ 内部模块BOM (优先级最高，放在最前面) -->
             <dependency>
                 <groupId>cn.meowrain.aioj</groupId>
                 <artifactId>aioj-backend-common-bom</artifactId>
-                <version>1.0.0</version>
+                <version>${revision}</version>
                 <type>pom</type>
                 <scope>import</scope>
             </dependency>
-            <!--Spring
-            Boot依赖-->
+            
+            <!-- Spring Boot 依赖管理 -->
             <dependency>
                 <groupId>org.springframework.boot</groupId>
                 <artifactId>spring-boot-dependencies</artifactId>
@@ -76,9 +82,8 @@
                 <type>pom</type>
                 <scope>import</scope>
             </dependency>
-            <!--            Spring Cloud依赖-->
-            <!--
-            https://mvnrepository.com/artifact/org.springframework.cloud/spring-cloud-dependencies -->
+            
+            <!-- Spring Cloud 依赖管理 -->
             <dependency>
                 <groupId>org.springframework.cloud</groupId>
                 <artifactId>spring-cloud-dependencies</artifactId>
@@ -86,6 +91,8 @@
                 <type>pom</type>
                 <scope>import</scope>
             </dependency>
+            
+            <!-- Spring Cloud Alibaba 依赖管理 -->
             <dependency>
                 <groupId>com.alibaba.cloud</groupId>
                 <artifactId>spring-cloud-alibaba-dependencies</artifactId>
@@ -102,27 +109,55 @@
                 <filtering>true</filtering>
             </resource>
         </resources>
+        
         <plugins>
+            <!-- Java 编译插件 -->
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-compiler-plugin</artifactId>
-                <version>3.14.1</version>
+                <version>${maven.compiler.plugin.version}</version>
                 <configuration>
-                    <source>17</source>
-                    <target>17</target>
+                    <source>${java.version}</source>
+                    <target>${java.version}</target>
                     <encoding>UTF-8</encoding>
                 </configuration>
             </plugin>
+            
+            <!-- Spring Boot Maven 插件 -->
             <plugin>
                 <groupId>org.springframework.boot</groupId>
                 <artifactId>spring-boot-maven-plugin</artifactId>
                 <version>${spring-boot.version}</version>
             </plugin>
-            <!--
-				代码格式插件，默认使用spring 规则，可运行命令进行项目格式化：./mvnw spring-javaformat:apply 或 mvn
-            spring-javaformat:apply，可在IDEA中安装插件以下插件进行自动格式化：
-				https://repo1.maven.org/maven2/io/spring/javaformat/spring-javaformat-intellij-idea-plugin
-			-->
+            
+            <!-- Flatten 插件：处理 ${revision} 变量 -->
+            <plugin>
+                <groupId>org.codehaus.mojo</groupId>
+                <artifactId>flatten-maven-plugin</artifactId>
+                <version>${flatten.plugin.version}</version>
+                <configuration>
+                    <updatePomFile>true</updatePomFile>
+                    <flattenMode>resolveCiFriendliesOnly</flattenMode>
+                </configuration>
+                <executions>
+                    <execution>
+                        <id>flatten</id>
+                        <phase>process-resources</phase>
+                        <goals>
+                            <goal>flatten</goal>
+                        </goals>
+                    </execution>
+                    <execution>
+                        <id>flatten.clean</id>
+                        <phase>clean</phase>
+                        <goals>
+                            <goal>clean</goal>
+                        </goals>
+                    </execution>
+                </executions>
+            </plugin>
+            
+            <!-- 代码格式插件 -->
             <plugin>
                 <groupId>io.spring.javaformat</groupId>
                 <artifactId>spring-javaformat-maven-plugin</artifactId>
@@ -135,8 +170,7 @@
                 </executions>
             </plugin>
 
-            <!--打包jar
-            与git commit 关联插件-->
+            <!-- Git Commit 信息插件 -->
             <plugin>
                 <groupId>io.github.git-commit-id</groupId>
                 <artifactId>git-commit-id-maven-plugin</artifactId>
@@ -150,7 +184,6 @@
                 <configuration>
                     <failOnNoGitDirectory>false</failOnNoGitDirectory>
                     <generateGitPropertiesFile>true</generateGitPropertiesFile>
-                    <!--因为项目定制了jackson的日期时间序列化/反序列化格式，因此这里要进行配置,不然通过management.info.git.mode=full进行完整git信息监控时会存在问题-->
                     <dateFormat>yyyy-MM-dd HH:mm:ss</dateFormat>
                     <includeOnlyProperties>
                         <includeOnlyProperty>^git.build.(time|version)$</includeOnlyProperty>
@@ -159,12 +192,14 @@
                 </configuration>
             </plugin>
         </plugins>
+        
         <pluginManagement>
             <plugins>
+                <!-- JIB Docker 镜像构建插件 -->
                 <plugin>
                     <groupId>com.google.cloud.tools</groupId>
                     <artifactId>jib-maven-plugin</artifactId>
-                    <version>3.4.5</version>
+                    <version>${jib.plugin.version}</version>
                     <configuration>
                         <allowInsecureRegistries>true</allowInsecureRegistries>
                         <from>