Migrate health analysis from Python scripts to a native Go shortcut
for better performance and single-binary distribution. Remove the
Python collector (fetcher.py) and move schema.sql into shortcuts/health/.
Resolved conflicts between PR #24 (+versions, +version-diff) and PR #26
(+reviews, +review). Unified prReviewsPath() to use existing prV1Path() helper.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>