The string "Comment text" is the dedup contract between
cli/comments.attach_callback, bib/sync._sync_notes, and the
upcoming migration script. Pull it out of the function-local scope
into a module constant so consumers can import it instead of
re-hardcoding the literal.
Surfaced by code review on commit 2f6e2d4.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
7c2d26ec57