fix: артикул — распознавание DPU/BlueField профиля (BF3/BF2)

DPU-лоты (DPU_BF3_B3220-32G) не подходили под regex parsePortSpeed
(рассчитан на NIC/HCA-суффиксы NpMGbE/pFC) и падали в заглушку
категории NET с предупреждением. Добавлен parseDPUModel — структурный
разбор DPU_{FAMILY}_{MODEL} без каталога вендоров.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

internal/article/generator_test.go

@@ -139,6 +139,59 @@ func contains(s, sub string) bool {
 	return strings.Contains(s, sub)
 }
 
+func TestParsePortSpeed_DPUModel(t *testing.T) {
+	cases := map[string]string{
+		"DPU_BF3_B3220-32G": "BF3_B3220-32G",
+		"DPU_BF2_B2220Q":    "BF2_B2220Q",
+	}
+	for in, want := range cases {
+		if got := parsePortSpeed(in); got != want {
+			t.Errorf("parsePortSpeed(%q) = %q, want %q", in, got, want)
+		}
+	}
+}
+
+// TestBuild_ParsesDPU verifies a DPU lot (e.g. NVIDIA BlueField) resolves to its
+// family+model token instead of falling back to the "NET" category placeholder —
+// DPU lots don't carry a NIC/HCA-style port-speed suffix, so parsePortSpeed needs
+// its own DPU branch (parseDPUModel).
+func TestBuild_ParsesDPU(t *testing.T) {
+	local, err := localdb.New(filepath.Join(t.TempDir(), "local.db"))
+	if err != nil {
+		t.Fatalf("init local db: %v", err)
+	}
+	t.Cleanup(func() { _ = local.Close() })
+
+	if err := local.SaveLocalPricelist(&localdb.LocalPricelist{
+		ServerID: 10, Source: "estimate", Version: "v1", Name: "t",
+		IsActive: true, CreatedAt: time.Now(), SyncedAt: time.Now(),
+	}); err != nil {
+		t.Fatalf("save pricelist: %v", err)
+	}
+	pl, err := local.GetLocalPricelistByServerID(10)
+	if err != nil {
+		t.Fatalf("get pricelist: %v", err)
+	}
+	if err := local.SaveLocalPricelistItems([]localdb.LocalPricelistItem{
+		{PricelistID: pl.ID, LotName: "DPU_BF3_B3220-32G", LotCategory: "DPU", Price: 1},
+	}); err != nil {
+		t.Fatalf("save items: %v", err)
+	}
+
+	result, err := Build(local, models.ConfigItems{
+		{LotName: "DPU_BF3_B3220-32G", Quantity: 1},
+	}, BuildOptions{ServerModel: "X1"})
+	if err != nil {
+		t.Fatalf("build: %v", err)
+	}
+	if len(result.Warnings) != 0 {
+		t.Fatalf("expected no warnings, got %v", result.Warnings)
+	}
+	if !contains(result.Article, "BF3_B3220-32G") {
+		t.Fatalf("expected DPU model token in article: %s", result.Article)
+	}
+}
+
 func TestParseGPUModel_VendorLetterSuffix(t *testing.T) {
 	cases := map[string]string{
 		"GPU_NV_RTX_PRO_6000D_SERVER_84GB_PCIE": "RTX6000D_84GB",