Introduce a Drawing table that tracks unique drawing numbers with their
current PDF content hash and revision counter. ExportRecord gains a
DrawingId FK. Includes a data migration to seed Drawings from existing
export records.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Each export record now keeps a complete BOM snapshot instead of moving
BomItems between records. CutTemplate gains a Revision field that
auto-increments when the content hash changes across exports for the
same drawing+item, and stays the same when the geometry is unchanged.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Add separate EquipmentNo and DrawingNo fields alongside the combined
DrawingNumber, plus a Title field for labeling exports. Updated across
Core model, DbContext, API DTOs, and ExportDXF models.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
