Update Borg dependency path from github.com/Snider/Borg to
forge.lthn.ai/Snider/Borg across go.mod and imports.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Build system, release automation, SDK generation, Ansible executor,
LinuxKit dev environments, container runtime, deployment, infra
metrics, and developer toolkit.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>