fix: 修复编译和启动错误

- application.yml: 合并重复的 management.health 节点，解决 DuplicateKeyException
- LocalAuthServiceTest.java: 补充 PlatformPrincipal/Set import 和类闭合括号

Signed-off-by: jangrui <admin@jangrui.com>

server/skillhub-app/src/main/resources/application.yml

@@ -214,6 +214,8 @@ management:
   health:
     mail:
       enabled: ${MANAGEMENT_HEALTH_MAIL_ENABLED:false}
+    ldap:
+      enabled: false
   endpoints:
     web:
       exposure:
@@ -221,9 +223,6 @@ management:
   endpoint:
     health:
       show-details: when-authorized
-  health:
-    ldap:
-      enabled: false
   metrics:
     tags:
       application: skillhub

server/skillhub-auth/src/test/java/com/iflytek/skillhub/auth/local/LocalAuthServiceTest.java

@@ -11,6 +11,7 @@ import static org.mockito.Mockito.verify;
 
 import com.iflytek.skillhub.auth.config.LdapProperties;
 import com.iflytek.skillhub.auth.exception.AuthFlowException;
+import com.iflytek.skillhub.auth.rbac.PlatformPrincipal;
 import com.iflytek.skillhub.auth.entity.Role;
 import com.iflytek.skillhub.auth.entity.UserRoleBinding;
 import com.iflytek.skillhub.auth.ldap.LdapAuthService;
@@ -24,6 +25,7 @@ import java.time.Instant;
 import java.time.ZoneOffset;
 import java.util.List;
 import java.util.Optional;
+import java.util.Set;
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
 import org.junit.jupiter.api.extension.ExtendWith;
@@ -321,4 +323,5 @@ class LocalAuthServiceTest {
             .isEqualTo(HttpStatus.UNAUTHORIZED);
 
         verify(ldapAuthService, never()).login(any(), any());
+    }
 }