Prepare for a bug fix release.

[buechlerm]

PR Summary

Release at 1.12.1 to include the registration of missing headers.

PR Checklist

• Adds a test for any bugs fixed. Adds tests for new features.
• Format your changes by using the make format command after configuring with cmake.
• Document any new features, update documentation for changes made.
• Make sure the copyright notice on any files you modified is up to date.
• After creating a pull request, note it in the CHANGELOG.md file.
• LANL employees: make sure tests pass both on the github CI and on the Darwin CI
• If ML was used, make sure to add a disclaimer at the top of a file indicating ML was used to assist in generating the file.
• If Agentic AI was used, have the AI generate a "proposed changes" markdown file and store it in the plan_histories folder, with a filename the same as the MR number.

If preparing for a new release, in addition please check the following:

• Update the version in cmake.
• Move the changes in the CHANGELOG.md file under a new header for the new release, and reset the categories.
• Maintainers: ensure spackages are up to date:
  • LANL-internal team, update XCAP spackages
  • Current maintainer of upstream spackages, submit MR to spack

[buechlerm]

What are the remaining steps? Create the tag and a github release, etc?

[Yurlungur]

LGTM. Did both #647 and #648 make it in? If so, this is good to go and I'll cut the release.

We will also need to update spack.

[Yurlungur]

What are the remaining steps? Create the tag and a github release, etc?

Yes if you click on the release thingy on the right bar, you can create a release after this is merged. I typically use the changelog for the release notes. You can create a tag inline when you make the release.

Then we need to submit an MR to xcap-spackages and to spack upstream each. If you're interested in doing that stuff, it's appreciated, if not I can do it.

[buechlerm]

Yes, I'll do it. I have an MR in to xcap-spackages to patch 1.12.0. I'll add 1.12.1 in that MR unless there are objections to combining them.

[Yurlungur]

Combining them sounds good to me. Thanks!