refactor(config): 重构数据源配置并优化产品请求DTO

- 移除旧的application.properties和application.yml配置文件
- 新增Druid数据源配置类，支持主从数据源手动配置
- 调整CreateProductRequestDTO中size字段的长度限制从200到500
- 更新size字段注释，明确JSON格式示例
- 修复因配置加载方式变更引起的应用启动异常问题

mt-pay/pom.xml

@@ -3,10 +3,10 @@
          xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://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>3.2.0</version>
-        <relativePath/> <!-- lookup parent from repository -->
+        <groupId>com.mtkj</groupId>
+        <artifactId>MTKJPAY</artifactId>
+        <version>0.0.1-SNAPSHOT</version>
+        <relativePath>../pom.xml</relativePath>
     </parent>
     <groupId>com.mtkj</groupId>
     <artifactId>mt-pay</artifactId>
@@ -52,11 +52,29 @@
             <scope>runtime</scope>
         </dependency>
         
-        <!-- MyBatis-Plus -->
+        <!-- MyBatis-Plus (升级到 3.5.8，兼容 Spring Boot 3.2.0) -->
         <dependency>
             <groupId>com.baomidou</groupId>
             <artifactId>mybatis-plus-boot-starter</artifactId>
-            <version>3.5.7</version>
+            <version>${mybatis-plus.version}</version>
+            <exclusions>
+                <!-- 排除旧版本的 mybatis-spring，强制使用 3.0.3 -->
+                <exclusion>
+                    <groupId>org.mybatis</groupId>
+                    <artifactId>mybatis-spring</artifactId>
+                </exclusion>
+                <!-- 排除 commons-logging 冲突 -->
+                <exclusion>
+                    <groupId>commons-logging</groupId>
+                    <artifactId>commons-logging</artifactId>
+                </exclusion>
+            </exclusions>
+        </dependency>
+        <!-- 强制使用 mybatis-spring 3.0.3（兼容 Spring 6.x） -->
+        <dependency>
+            <groupId>org.mybatis</groupId>
+            <artifactId>mybatis-spring</artifactId>
+            <version>${mybatis-spring.version}</version>
         </dependency>
         
         <!-- 阿里云OSS SDK -->
@@ -64,6 +82,13 @@
             <groupId>com.aliyun.oss</groupId>
             <artifactId>aliyun-sdk-oss</artifactId>
             <version>3.17.4</version>
+            <exclusions>
+                <!-- 排除 commons-logging 冲突 -->
+                <exclusion>
+                    <groupId>commons-logging</groupId>
+                    <artifactId>commons-logging</artifactId>
+                </exclusion>
+            </exclusions>
         </dependency>
         
         <!-- Druid数据源 -->
@@ -71,6 +96,13 @@
             <groupId>com.alibaba</groupId>
             <artifactId>druid-spring-boot-3-starter</artifactId>
             <version>1.2.20</version>
+            <exclusions>
+                <!-- 排除 commons-logging 冲突 -->
+                <exclusion>
+                    <groupId>commons-logging</groupId>
+                    <artifactId>commons-logging</artifactId>
+                </exclusion>
+            </exclusions>
         </dependency>
         
         <!-- Spring Boot Validation -->