* fix(#628): read snake_case requirements_completed in summary-extract
cmdSummaryExtract read only the kebab frontmatter key
`requirements-completed`, but the tool's own JSON output key and the
milestone-audit `--pick` both use the snake form `requirements_completed`.
A SUMMARY written in the snake form the tool itself emits was silently
read back as [] — a false negative in milestone requirement traceability
with no diagnostic.
Make the reader tolerant of both key forms (kebab takes precedence), so a
round-tripped field is no longer dropped. extractFrontmatter does no
hyphen<->underscore normalization, so distinct keys had to be read
explicitly.
Adds regression tests: snake-only fixture now returns the IDs, and a
both-forms-present fixture asserts kebab precedence.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
* chore(#628): add changeset for summary-extract snake-key fix
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>
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