Add validation in GetProxyConfiguration to detect when stored proxy config
belongs to a different proxy type (e.g., Traefik config on a Caddy server)
and trigger regeneration with a warning log. Clear cached proxy configuration
and settings when proxy type is changed to prevent stale configs from being
reused. Includes tests verifying config rejection on type mismatch and
graceful fallback on invalid YAML.
- Store proxy configuration in database as primary source for faster access
- Implement automatic timestamped backups when configuration changes
- Add backfill migration logic to recover configs from disk for legacy servers
- Simplify UI by removing loading states (config now readily available)
- Add comprehensive logging for debugging configuration generation and recovery
- Include unit tests for config recovery scenarios
