build(deps): bump mybatis-plus.version in /services

Bumps `mybatis-plus.version` from 3.5.15 to 3.5.16.

Updates `com.baomidou:mybatis-plus-spring-boot4-starter` from 3.5.15 to 3.5.16
- [Release notes](https://github.com/baomidou/mybatis-plus/releases)
- [Changelog](https://github.com/baomidou/mybatis-plus/blob/3.0/CHANGELOG.md)
- [Commits](https://github.com/baomidou/mybatis-plus/compare/v3.5.15...v3.5.16)

Updates `com.baomidou:mybatis-plus-jsqlparser` from 3.5.15 to 3.5.16
- [Release notes](https://github.com/baomidou/mybatis-plus/releases)
- [Changelog](https://github.com/baomidou/mybatis-plus/blob/3.0/CHANGELOG.md)
- [Commits](https://github.com/baomidou/mybatis-plus/compare/v3.5.15...v3.5.16)

---
updated-dependencies:
- dependency-name: com.baomidou:mybatis-plus-spring-boot4-starter
  dependency-version: 3.5.16
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: com.baomidou:mybatis-plus-jsqlparser
  dependency-version: 3.5.16
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

services/pom.xml

@@ -20,7 +20,7 @@
         <java.version>17</java.version>
         <spring-boot.version>4.0.0</spring-boot.version>
         <!-- 平台数据访问：PostgreSQL 15 + MyBatis-Plus（Spring Boot 4 用 boot4-starter） -->
-        <mybatis-plus.version>3.5.15</mybatis-plus.version>
+        <mybatis-plus.version>3.5.16</mybatis-plus.version>
     </properties>
 
     <!--