kettle-dev 2.5.12: Preserve platforms when rebuilding release locks

🏷️ release kettle-dev 🏷️ 2.5.12

Version 2.5.12 keeps existing lockfile platforms and adds the current host during a full reset. A maintainer rebuilding on another platform no longer accidentally drops Linux from the release lockfile.

Read the upstream release notes for the complete changes and see the project repository for usage and installation.