GH#464: Add safety guards to prevent deletion of open/in_progress issues during sync:
- Safety guard in git-history-backfill (importer.go)
- Safety guard in deletions manifest processing
- Warning when uncommitted changes detected before pull (daemon_sync.go)
- Enhanced repo ID mismatch error message
GH#545: Fix bd blocked to show status=blocked issues (sqlite/ready.go):
- Changed from INNER JOIN to LEFT JOIN to include issues without dependencies
- Added WHERE clause to include both status=blocked AND dependency-blocked issues
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Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>