chore: upgrade major version for cap and spring-boot

[Schmarvinius]

• Adapted java min version to 21 according to cap java 5.0.0
• Bumped Major Versions for cds-services and spring-boot in plugins and also for sample
• Bumped Revision to 0.0.2-alpha

[hyperspace-insights]

Summary

The following content is AI-generated and provides a summary of the pull request:

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Upgrade Major Versions for CAP Java and Spring Boot

Chore

🔧 Bumped major dependency versions across the project, adapting the minimum Java version and updating import paths broken by the Spring Boot 4.x package reorganization.

Changes

• pom.xml: Updated revision to 0.0.2-alpha, raised java.version from 17 → 21, bumped cds.services.version from 4.9.0 → 5.0.0, and upgraded spring.boot.version from 3.4.5 → 4.1.0.
• samples/bookshop/pom.xml: Aligned the bookshop sample with the same major version bumps (java.version 17 → 21, cds.services.version 4.9.0 → 5.0.0, spring.boot.version 3.5.6 → 4.1.0).
• integration-tests/mtx-local/srv/pom.xml & integration-tests/spring/pom.xml & samples/bookshop/srv/pom.xml: Added spring-boot-starter-webmvc-test as a test-scoped dependency, required by Spring Boot 4.x.
• MtxLifecycleTest.java, SubscribeUnsubscribeTest.java, TenantIsolationTest.java, BaseIntegrationTest.java, ApplicationTest.java: Migrated @AutoConfigureMockMvc import from the deprecated org.springframework.boot.test.autoconfigure.web.servlet package to the new org.springframework.boot.webmvc.test.autoconfigure package introduced in Spring Boot 4.x.

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PR Bot Information

Version: 1.26.14

• Summary Prompt: Default Prompt
• Event Trigger: pull_request.opened
• LLM: anthropic--claude-4.6-sonnet
• Output Template: Default Template
• File Content Strategy: Full file content
• Correlation ID: bd55cb20-7935-11f1-8029-de772f42838d

[hyperspace-insights]

The PR upgrades CDS/Spring Boot to major versions but has two concrete bugs: the spring-boot-starter-webmvc-test artifact ID is incorrect across all three POMs (should be spring-boot-webmvc-test), and the samples/bookshop sample still references the old 0.0.1-alpha version of cds-starter-ai after the project was bumped to 0.0.2-alpha. Both issues will cause build or resolution failures and must be fixed before merging.

PR Bot Information

Version: 1.26.14

• Correlation ID: bd55cb20-7935-11f1-8029-de772f42838d
• LLM: anthropic--claude-4.6-sonnet
• Event Trigger: pull_request.opened
• File Content Strategy: Full file content

[hyperspace-insights]

Bug: spring-boot-starter-webmvc-test is not a valid Spring Boot artifact — the correct artifact for the WebMVC test autoconfigure module in Spring Boot 4.x is spring-boot-webmvc-test (no "starter" prefix). Using the wrong artifact ID will cause a dependency resolution failure.

Suggested change

	<artifactId>spring-boot-starter-webmvc-test</artifactId>
	<artifactId>spring-boot-webmvc-test</artifactId>

Double-check suggestion before committing. Edit this comment for amendments.

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