Merge branch '1.5.x'

Author: shakuzen

.github/dco.yml

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+require:
+  members: false

CONTRIBUTING.md

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+# Contributing Guide
+
+This Contributing Guide is intended for those that would like to contribute to this repository.
+
+If you would like to use any of the published modules in your project, you can instead
+include the artifacts from the Maven Central repository using your build tool of choice or the published container images.
+
+## Code of Conduct
+
+See [our Contributor Code of Conduct](https://github.com/micrometer-metrics/.github/blob/main/CODE_OF_CONDUCT.md).
+
+## Contributions
+
+Contributions come in various forms and are not limited to code changes. The community benefits from
+contributions in all forms.
+
+For example, those with knowledge and experience can contribute by:
+
+* Answering [Stackoverflow questions](https://stackoverflow.com/tags/prometheus-rsocket-proxy)
+* Answering questions on the [Micrometer slack](https://slack.micrometer.io)
+* Share knowledge in other ways (e.g. presentations, blogs)
+
+The remainder of this document will focus on guidance for contributing code changes. It will help contributors to build,
+modify, or test the source code.
+
+## Include a Signed Off By Trailer
+
+All commits must include a *Signed-off-by* trailer at the end of each commit message to indicate that the contributor agrees to the [Developer Certificate of Origin](https://developercertificate.org).
+For additional details, please refer to the blog post [Hello DCO, Goodbye CLA: Simplifying Contributions to Spring](https://spring.io/blog/2025/01/06/hello-dco-goodbye-cla-simplifying-contributions-to-spring).
+
+## Getting the source
+
+The source code is hosted on GitHub at https://github.com/micrometer-metrics/prometheus-rsocket-proxy. You can use a
+Git client to clone the source code to your local machine.
+
+## Building
+
+This project targets Java 8.
+
+The Gradle wrapper is provided and should be used for building with a consistent version of Gradle.
+
+The wrapper can be used with a command, for example, `./gradlew check` to build the project and check conventions.
+
+## Importing into an IDE
+
+This repository should be imported as a Gradle project into your IDE of choice.
+
+## Testing changes locally
+
+Specific modules or a test class can be run from your IDE for convenience.
+
+The Gradle `check` task depends on the `test` task, and so tests will be run as part of a build as described previously.
+
+### Publishing local snapshots
+
+Run `./gradlew pTML` to publish a Maven-style snapshot to your Maven local repo. The build automatically calculates
+the "next" version for you when publishing snapshots.
+
+These local snapshots can be used in another project to test the changes.