feat: add PostgreSQL web installation wizard

oa-backend/src/main/java/com/kaidi/oa/seed/ItDeptDemoSeeder.java

@@ -15,7 +15,6 @@ import com.kaidi.oa.repository.ItSecPolicyConfigRepository;
 import org.springframework.boot.ApplicationArguments;
 import org.springframework.boot.ApplicationRunner;
 import org.springframework.core.annotation.Order;
-import org.springframework.stereotype.Component;
 
 import java.math.BigDecimal;
 import java.time.Instant;
@@ -27,7 +26,7 @@ import java.time.ZoneOffset;
  * @Order(204) 在所有主数据Seeder后运行，幂等（count > 0 则跳过）。
  */
 @Order(204)
-@Component
+@DemoSeed
 public class ItDeptDemoSeeder implements ApplicationRunner {
 
     private final ItMonitorItemRepository monitorRepo;