fix: resolve JDK 25 class-file compatibility in spring-reactive tests

Spring Framework 6.1.6 (Boot 3.2.5) bundles an ASM version that
cannot parse JDK 25 class files (major version 69), causing
spring-reactive's @SpringBootTest integration tests to fail with
ClassFormatException during classpath component scanning.

- Bump spring-boot.version to 3.5.16 (Spring Framework 6.2.x,
  ASM 9.8+, real JDK 25 classfile support) and spring-cloud.version
  to the matching 2025.0.3 release train.
- Drop the hardcoded slf4j-api/logback-classic version overrides so
  they're managed by the Spring Boot BOM again; the old pins were
  incompatible with the newer Boot version and caused
  NoSuchMethodError: LoggerContext.initCollisionMaps().
- Migrate spring-batch's SpringBatchConfig off JobBuilderFactory/
  StepBuilderFactory (removed in the Spring Batch version bundled
  with Boot 3.5.x) to the JobRepository/JobBuilder/StepBuilder API.

Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>

Author: milanrath0d

pom.xml

@@ -26,8 +26,8 @@
 
     <properties>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-        <spring-boot.version>3.2.5</spring-boot.version>
-        <spring-cloud.version>2023.0.0</spring-cloud.version>
+        <spring-boot.version>3.5.16</spring-boot.version>
+        <spring-cloud.version>2025.0.3</spring-cloud.version>
         <java.version>25</java.version>
         <junit-jupiter.version>5.10.1</junit-jupiter.version>
     </properties>
@@ -97,12 +97,10 @@
         <dependency>
             <groupId>org.slf4j</groupId>
             <artifactId>slf4j-api</artifactId>
-            <version>2.0.9</version>
         </dependency>
         <dependency>
             <groupId>ch.qos.logback</groupId>
             <artifactId>logback-classic</artifactId>
-            <version>1.4.14</version>
         </dependency>
 
         <!-- Test Dependencies -->

spring-batch/src/main/java/org/milan/configuration/SpringBatchConfig.java

@@ -4,9 +4,10 @@
 import org.springframework.batch.core.Job;
 import org.springframework.batch.core.Step;
 import org.springframework.batch.core.configuration.annotation.EnableBatchProcessing;
-import org.springframework.batch.core.configuration.annotation.JobBuilderFactory;
-import org.springframework.batch.core.configuration.annotation.StepBuilderFactory;
+import org.springframework.batch.core.job.builder.JobBuilder;
 import org.springframework.batch.core.launch.support.RunIdIncrementer;
+import org.springframework.batch.core.repository.JobRepository;
+import org.springframework.batch.core.step.builder.StepBuilder;
 import org.springframework.batch.item.ItemProcessor;
 import org.springframework.batch.item.ItemReader;
 import org.springframework.batch.item.ItemWriter;
@@ -19,6 +20,7 @@
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.core.io.Resource;
+import org.springframework.transaction.PlatformTransactionManager;
 
 /**
  * Configuration for spring batch
@@ -30,18 +32,18 @@
 public class SpringBatchConfig {
 
     @Bean
-    public Job job(JobBuilderFactory jobBuilderFactory,
-                   StepBuilderFactory stepBuilderFactory,
+    public Job job(JobRepository jobRepository,
+                   PlatformTransactionManager transactionManager,
                    ItemReader<User> itemReader,
                    ItemProcessor<User, User> itemProcessor,
                    ItemWriter<User> itemWriter) {
-        Step step = stepBuilderFactory.get("ETL-file-load")
-            .<User, User>chunk(100)
+        Step step = new StepBuilder("ETL-file-load", jobRepository)
+            .<User, User>chunk(100, transactionManager)
             .reader(itemReader)
             .processor(itemProcessor)
             .writer(itemWriter)
             .build();
-        return jobBuilderFactory.get("ETL-Load")
+        return new JobBuilder("ETL-Load", jobRepository)
             .incrementer(new RunIdIncrementer())
             .start(step)
             .build();