- Deprecate OpenTelemetry ZipkinSpanExporter with removal planned for Spring Boot 4.2.
- Upgrade Jackson to 2.21.1 and 3.1.0 and refresh a wide range of Spring and third‑party dependencies (e.g., Spring Framework 7.0.6, Spring Security 7.0.4).
- Add numerous bug fixes and documentation updates across Actuator, Docker, RSocket, security headers, and other core components.
v4.0.4
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Fixed a wide range of bugs in Kafka security handling, Cloud Foundry integration, Spring Boot components, and resource cleanup.
Spring Boot Gradle plugin no longer auto‑configures gRPC when the Protobuf plugin is applied; opt‑in via an empty grpc block in the protobuf extension.