[META] Introduce keep-a-changelog to all clients

[dblock]

What kind of business use case are you trying to solve? What are your requirements?

Release notes are of varying quality. Similar to opensearch-project/OpenSearch#1868.

What is the problem? What is preventing you from meeting the requirements?

• Release notes aren't always super useful and may lack context.
• Release notes are only available at release time, and not during development, so it's unclear what has changed.

What are you proposing? What do you suggest we do to solve the problem or improve the existing situation?

1. Replace authoring release notes at the end before a release with authoring release notes in each PR.
2. Require that release notes be updated via something like danger-changelog with every change.

An implementation of this was done in OpenSearch core in opensearch-project/OpenSearch#4085. Copy-paste that into all clients.

[wbeckler]

How has this been going for core? If it's hunky dory, it makes sense to raise the bar for client repos.

[dblock]

opensearch-project/OpenSearch#1868

Yep, like so: opensearch-project/OpenSearch#4085 and opensearch-project/OpenSearch#4296

[dblock]

Here's another example why we should do this: opensearch-project/opensearch-js#290 (comment) - user is reading docs that are newer than the released software and I can't tell what was released in the last version vs. what was added since

[harshavamsi]

This is complete across all clients and can be closed. I'm tracking the discussion in opensearch-project/OpenSearch#4936 and will update the implementation if anything changes.

[dblock]

I noticed we don't do CHANGELOG updates in some dependabot PRs, can we please fix that?

[harshavamsi]

I noticed we don't do CHANGELOG updates in some dependabot PRs, can we please fix that?

It's weird. We have the dependabot_pr action that should update the changelog if the PR is raised by dependabot. But sometimes we have to manually do a dependabot recreate to get it to update the changelog.

[dblock]

https://github.com/opensearch-project/opensearch-dsl-py/blob/main/CHANGELOG.md
https://github.com/opensearch-project/opensearch-go/blob/main/CHANGELOG.md
https://github.com/opensearch-project/opensearch-java/blob/main/CHANGELOG.md
https://github.com/opensearch-project/opensearch-js/blob/main/CHANGELOG.md
https://github.com/opensearch-project/opensearch-net/blob/main/CHANGELOG.md
https://github.com/opensearch-project/opensearch-php/blob/main/CHANGELOG.md
https://github.com/opensearch-project/opensearch-py/blob/main/CHANGELOG.md
https://github.com/opensearch-project/opensearch-ruby/blob/main/CHANGELOG.md
https://github.com/opensearch-project/opensearch-rs/blob/main/CHANGELOG.md
https://github.com/opensearch-project/opensearch-hadoop/blob/main/CHANGELOG.md