Review Low: the module comment and the _edit_trailer_armed summary still said
"a commit message ... does arm" / "some commit", while the matcher excludes merges.
The decision Rule and catalog already carried the qualification; these two did not.
Comment-only.
fixes#609
Decisions-Edit: yes
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>