Update to Camunda 8.9 and Spring Boot 4

[maxbehr801]

No description provided.

[Copilot]

Pull request overview

Updates the project’s dependency baseline to align the Camunda 8 connector with Camunda 8.9 while moving the main build to Spring Boot 4, keeping the Camunda 7 module on Spring Boot 3 for compatibility.

Changes:

• Bump Spring Boot to 4.0.6 at the root and introduce a separate version.spring-boot-c7 property for the C7 module.
• Update Camunda Platform 8 dependency version to 8.9.0 and simplify C8 module BOM management.
• Refresh documentation (compatibility matrix + updated links) and update the C8 Docker build image.

Reviewed changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
pom.xml	Upgrades Spring Boot and adds a dedicated Boot version property for the C7 module.
camunda-carbon-reductor-c8/pom.xml	Removes redundant Spring Boot dependencyManagement import (inherits from parent chain).
camunda-carbon-reductor-c8/README.md	Updates documentation link for Camunda 8 Spring Zeebe SDK configuration.
camunda-carbon-reductor-c8/Dockerfile	Updates Maven build image used for building the C8 connector container.
camunda-carbon-reductor-c7/pom.xml	Pins the C7 module to Spring Boot 3 dependency BOM and plugin version.
README.md	Expands compatibility matrix to include Spring Boot versions per module/release.

Comments suppressed due to low confidence (1)

camunda-carbon-reductor-c8/Dockerfile:5

• Only the build stage was updated to a newer Maven/Temurin image, but the runtime stage still uses openjdk:17.0.1-jdk-slim, which is very old and likely misses important security fixes. Consider updating the runtime base image as well (and ideally aligning it with the same distribution/vendor) to avoid shipping an outdated JDK in production.

FROM maven:3.9.9-eclipse-temurin-17 AS build
COPY . .
RUN mvn clean package -DskipTests

FROM openjdk:17.0.1-jdk-slim AS run

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[Copilot]

version.spring-boot is now unused in the repo (the parent version is hard-coded above, and no module references ${version.spring-boot} anymore). Consider removing this property to avoid confusion, or use it consistently (e.g., for the parent version) so there’s a single source of truth.

Suggested change

<version.spring-boot>4.0.6</version.spring-boot>

[Copilot]

The XML comment says “Spring Boot 4 is not available”, but this module is overriding Spring Boot to 3.x because Boot 4 isn’t supported/compatible for the Camunda 7 module (while the overall build is using Boot 4). Consider rewording the comment to reflect the compatibility constraint to avoid misleading future readers.

Suggested change

	<!-- C7 - explicitly override to Spring Boot 3 as Spring Boot 4 is not available -->
	<!-- C7 - explicitly override to Spring Boot 3 because Camunda 7 is not supported/compatible with Spring Boot 4 in this module -->