Embeds CL-980.json as a resource in OpenNest.Data and adds EnsureDefaults()
to LocalJsonProvider, which seeds the machines directory on first run when empty.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
One JSON file per machine named by GUID, stored in a configurable directory.
Supports save, load, list (as summaries), and delete with IO-error retry.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
