Spring boot 4 support

[geirsagberg]

Claude Opus 4.6 did the heavy lifting; tested and ran the example app, seems to work

[Copilot]

Pull request overview

This pull request attempts to add Spring Boot 4 support to the db-scheduler-ui project by introducing two new modules: db-scheduler-ui-starter-boot4 and example-app-boot4. The PR also includes minor updates to the parent POM (plugin versions, Lombok configuration) and modifications to the core GetTasksResponse class for null safety.

Changes:

• Added db-scheduler-ui-starter-boot4 and example-app-boot4 modules for Spring Boot 4 support
• Updated Spotless plugin (2.44.3 → 3.2.1) and Google Java Format (1.17.0 → 1.28.0)
• Modified GetTasksResponse constructor to handle null/zero pageSize values
• Added GitHub Actions workflow for testing Boot 4 modules
• Updated CLAUDE.md and .gitignore

Reviewed changes

Copilot reviewed 33 out of 34 changed files in this pull request and generated 9 comments.

Show a summary per file

File	Description
pom.xml	Added Spring Boot 4 version properties, new Boot 4 modules, updated plugin versions, added Lombok annotation processor configuration
db-scheduler-ui/src/main/java/no/bekk/dbscheduler/ui/model/GetTasksResponse.java	Changed pageSize parameter to Integer and added null/zero checks to prevent division by zero
db-scheduler-ui-starter-boot4/pom.xml	New Spring Boot 4 starter module POM with dependencies
db-scheduler-ui-starter-boot4/src/main/java/**/*.java	Spring Boot 4 starter auto-configuration and configuration classes (near-duplicate of Boot 3 starter)
example-app-boot4/pom.xml	New Spring Boot 4 example application POM
example-app-boot4/src/main/java/**/*.java	Example application code (complete duplicate of example-app)
example-app-boot4/src/test/java/**/*.java	Test classes with Boot 4-specific test utilities
example-app-boot4/src/main/resources/**/*	Application properties and database migration scripts (duplicates)
.github/workflows/tests.yml	Added workflow job for testing Boot 4 modules
CLAUDE.md	Added documentation file for Claude Code assistant
.gitignore	Added .claude directory exclusion

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[geirsagberg]

Admittedly a lot of duplication; but the starter probably won't be updated very often, and this way we can just delete the old one once SB3-support is dropped