* fix(doctor): UX improvements for diagnostics and daemon
- Add Repo Fingerprint check to detect when database belongs to a
different repository (copied .beads dir or git remote URL change)
- Add interactive fix for repo fingerprint with options: update repo ID,
reinitialize database, or skip
- Add visible warning when daemon takes >5s to start, recommending
'bd doctor' for diagnosis
- Detect install method (Homebrew vs script) and show only relevant
upgrade command
- Improve WARNINGS section:
- Add icons (⚠ or ✖) next to each item
- Color numbers by severity (yellow for warnings, red for errors)
- Render entire error lines in red
- Sort by severity (errors first)
- Fix alignment with checkmarks above
- Use heavier fail icon (✖) for better visibility
- Add integration and validation tests for doctor fixes
* fix(lint): address errcheck and gosec warnings
- mol_bond.go: explicitly ignore ephStore.Close() error
- beads.go: add nosec for .gitignore file permissions (0644 is standard)
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