chore: upgrade Spring Boot 3.4.5 -> 4.0.0 with compiler and SecurityConfig fixes

- Move maven-compiler-plugin from pluginManagement to plugins for proper release 17 inheritance
- Remove deprecated UserDetailsServiceAutoConfiguration exclude (removed in Boot 4.0)
- Switch MyBatis-Plus to boot4-starter

services/delivery-platform-api/pom.xml

@@ -67,7 +67,7 @@
         </dependency>
         <dependency>
             <groupId>com.baomidou</groupId>
-            <artifactId>mybatis-plus-spring-boot3-starter</artifactId>
+            <artifactId>mybatis-plus-spring-boot4-starter</artifactId>
         </dependency>
         <dependency>
             <groupId>com.baomidou</groupId>

services/delivery-platform-api/src/main/java/cn/craftlabs/platform/api/PlatformApplication.java

@@ -3,10 +3,9 @@ package cn.craftlabs.platform.api;
 import org.mybatis.spring.annotation.MapperScan;
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
-import org.springframework.boot.autoconfigure.security.servlet.UserDetailsServiceAutoConfiguration;
 import org.springframework.security.config.annotation.method.configuration.EnableMethodSecurity;
 
-@SpringBootApplication(exclude = UserDetailsServiceAutoConfiguration.class)
+@SpringBootApplication
 @EnableMethodSecurity
 @MapperScan("cn.craftlabs.platform.api.persistence")
 public class PlatformApplication {