Release Comet 0.12.0 (November 2025)

[andygrove]

What is the problem the feature request solves?

Let's use this issue to coordinate on which issues/PRs should be included in the next release.

Milestone https://github.com/apache/datafusion-comet/milestone/12

Describe the potential solution

Issues and PRs that we should include in the release:

• https://github.com/apache/datafusion-comet/issues/2612
• https://github.com/apache/datafusion-comet/issues/2739
  • Fix: https://github.com/apache/datafusion-comet/pull/2748
• https://github.com/apache/datafusion-comet/pull/2756
• https://github.com/apache/datafusion-comet/issues/1926
• https://github.com/apache/datafusion-comet/pull/2747

Additional context

No response