aede94e757
Create a timestamped backup (~/.hermes/config.yaml.bak.YYYYMMDD_HHMMSS) before the setup wizard runs any configuration sections. After setup completes, show the backup path and a restore command. This protects user-customized values (compression thresholds, provider routing, PII redaction, auxiliary model configs) from being silently overwritten by setup defaults. Addresses #3522