feat: add PostgreSQL web installation wizard

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

@@ -8,7 +8,6 @@ import com.kaidi.oa.repository.SewageExtLabCommissionRepository;
 import org.springframework.boot.ApplicationArguments;
 import org.springframework.boot.ApplicationRunner;
 import org.springframework.core.annotation.Order;
-import org.springframework.stereotype.Component;
 import org.springframework.transaction.annotation.Transactional;
 
 import java.time.Instant;
@@ -22,7 +21,7 @@ import java.time.temporal.ChronoUnit;
  *
  * 幂等：linkageRepo.count() == 0 才插入；commRepo.count() == 0 才插入。
  */
-@Component
+@DemoSeed
 @Order(30)
 public class SewageCrossDeptSeeder implements ApplicationRunner {