Problem:
- Diagnostic fix messages were restricted to single lines
- Inconsistent file path formatting in database sync issues
- Outdated cleanup command suggested in maintenance fixes
Solution:
- Implement multiline support for doctor fix messages
- Standardize issue file paths across database diagnostics
- Update maintenance fix instructions to use 'bd admin cleanup'
Impact:
- Clearer and more accurate recovery instructions for users
- Better readability of complex diagnostic output
Fixes: GH#1170, GH#1171, GH#1172