rebrand backup service following upstream project rename.
updates docker image to databasus/databasus:latest,
adds healthcheck, and includes cleanup function for
migration from old container name.
- add adaptive terminal sizing for all whiptail dialogs (wt_get_size)
- add new wrapper functions: wt_checklist, wt_radiolist, wt_menu
- add safe parser wt_parse_choices to replace eval
- improve NEWT_COLORS theme with better contrast (brightgreen/brightcyan)
- add new logging functions: log_header, log_subheader, log_divider, log_box
- add spinner animation utilities for progress indication
- expand color palette with bright variants and text styles
- update 04_wizard.sh to use new whiptail wrappers
- add make doctor command for system diagnostics (dns, ssl, containers, disk, memory)
- add make update-preview for dry-run update checks without applying changes
- add service groups to wizard with quick start pack (n8n + monitoring + postgresus + portainer)
- add make switch-beta and switch-stable commands for branch switching
- update readme with organized commands table
