The corrupt-cause recovery guidance hardcoded `~/.hermes/backups/` while
every other path in the same message follows the active HERMES_HOME
(`{db_path}` is already interpolated). A custom-home or named-profile
deployment was told to restore from a directory that may not exist at all,
mid data-loss incident. Both sites (turn-completion explainer and gateway
startup broadcast) now interpolate `<hermes_root>/backups` via
get_default_hermes_root(), matching hermes_cli/backup.py's real backup
location.
Fixes#104250
liuhao1024