- Change database extension from .nrdb to .db for standard SQLite convention
- Modify make_and_restart_relay.sh to run executable from build/ directory
- Database files now created in build/ directory alongside executable
- Enhanced --preserve-database flag with backup/restore functionality
- Updated source code references in config.c and main.c
- Port auto-increment functionality remains fully functional
- Add --database-path/-D command line parameter for database override
- Store actual database and config file paths as metadata in config tables
- Fix circular dependency by making command line overrides runtime-only
- Support multiple relay instances with separate databases and configurations
- Clean path normalization removes redundant ./ prefixes
- New fields: database_location and config_location for tracking actual usage
