Remove CutFabApiClient and DrawingSelectionForm - exports no longer
depend on an external API server. DXF/PDF files are saved directly
to a configurable output folder, and export records are persisted
to a local SQL Server database via EF Core.
Replace Color-based progress logging with LogLevel enum across all
services. Redesign MainForm with equipment/drawing filter dropdowns
populated from export history, log row coloring by severity, and
simplified startup flow in Program.cs.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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