Update project to Java 21 and Spring Boot 4.0.2#24

Merged

mark79-github merged 23 commits intomasterfrom

feature/upgrade-sprint-boot-to-v4

Feb 17, 2026

Commits on Feb 13, 2026

Update project to Java 21, Spring Boot 4.0.2, and add new test dependencies
mark79-github
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Update system properties to require Java 21
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Update Dockerfile to use Java 21 alpine image
mark79-github
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Restrict /log/** to ROOT role and update static resource matchers
mark79-github
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Fix import for PathRequest to match Spring Boot 4 changes
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Refactor HomeController to improve authentication check using Authentication instead of Principal
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Replace ROLE_ROOT with ROOT in PreAuthorize annotations for consistency
mark79-github
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Remove unnecessary @Async and @EnableAsync annotations from ScheduleService interface
mark79-github
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Commits on Feb 17, 2026