feat(pricing): add cucloud and bytedance payg importers

- Add import_cucloud_pricing.go for 联通云 payg 公开价抓取
- Add import_bytedance_pricing.go for 火山引擎/ByteDance Ark 定价导入
- Include test files and sample testdata for both importers
- Update plan catalog inventory docs and seeds
- Add cucloud pricing importer implementation plan
- Align pipeline scripts and smoke gate tests

scripts/import_plan_catalog_test.go

@@ -24,8 +24,8 @@ func TestBuildPlanCatalogRows(t *testing.T) {
 	if err != nil {
 		t.Fatalf("buildPlanCatalogRows 失败: %v", err)
 	}
-	if len(rows) != 70 {
-		t.Fatalf("期望 70 条基础目录记录，实际 %d", len(rows))
+	if len(rows) != 71 {
+		t.Fatalf("期望 71 条基础目录记录，实际 %d", len(rows))
 	}
 
 	foundVendorTop20 := false
@@ -38,6 +38,7 @@ func TestBuildPlanCatalogRows(t *testing.T) {
 		"aliyun-bailian-coding-plan":              "import_aliyun_subscription.go",
 		"baidu-qianfan-token-benefit-pack":        "import_baidu_subscription.go",
 		"baidu-qianfan-coding-plan":               "import_baidu_subscription.go",
+		"bytedance-doubao-api-payg":               "import_bytedance_pricing.go",
 		"zhipu-glm-coding-plan":                   "import_zhipu_coding_plan.go",
 		"minimax-token-plan":                      "import_minimax_subscription.go",
 		"volcengine-ark-coding-plan":              "import_bytedance_subscription.go",
@@ -46,7 +47,8 @@ func TestBuildPlanCatalogRows(t *testing.T) {
 		"ctyun-coding-plan":                       "import_ctyun_subscription.go",
 		"cucloud-aicp-platform":                   "import_cucloud_catalog.go",
 		"cucloud-ai-app-platform":                 "import_cucloud_catalog.go",
-		"mobile-cloud-ai-market":                  "import_mobile_cloud_catalog.go",
+		"cucloud-aisp-token-plan-pricing":         "import_cucloud_pricing.go",
+		"mobile-cloud-ai-market":                  "import_mobile_cloud_pricing.go",
 		"aliyun-modelscope-api-inference":         "import_catalog_seed_verification.go",
 		"youdao-zhiyun-maas":                      "import_youdao_pricing.go",
 		"ctyun-model-inference-payg":              "import_catalog_seed_verification.go",
@@ -135,13 +137,13 @@ func TestRunPlanCatalogImportDryRunPrintsSummary(t *testing.T) {
 	output := out.String()
 	for _, want := range []string{
 		"source=plan-catalog-import",
-		"rows=70",
+		"rows=71",
 		"coding_plan:7",
 		"package_plan:1",
-		"pay_as_you_go:51",
-		"token_plan:7",
-		"unknown:4",
-		"confirmed:70",
+		"pay_as_you_go:52",
+		"token_plan:8",
+		"unknown:3",
+		"confirmed:71",
 		"dry_run=true",
 	} {
 		if !strings.Contains(output, want) {