Fix create migration command

Editor assessment

Adequate but carelessly assembled. The subject 'fix create migration command' is imperative, short, and specific enough that anyone who hit the broken command will recognize it instantly — good. The body, however, is the header repeated verbatim, which serves no purpose; either delete it or spend the lines on what was wrong with the command (wrong flag? wrong order?) so the fix is self-documenting. This duplication pattern appears repeatedly in this repo's docs history, suggesting the squash-merge template blindly echoes the title. No scope, consistent with practice; no breaking markers, correctly. Structure technically satisfies the spec — blank line, valid body — so tooling is unaffected, and the changelog entry will be clear. It is the wasted repetition, not any rule violation, that makes this mediocre rather than good.