feat(import): add CoreHub pricing collector and importer

- coreshub_pricing_lib.go: CoreHub pricing data extraction and parsing
- import_coreshub_pricing.go: importer with dry_run support
- import_coreshub_pricing_test.go: unit tests for importer
- coreshub_pricing_sample.txt: test fixture

scripts/import_coreshub_pricing_test.go

@@ -0,0 +1,64 @@
+//go:build llm_script
+
+package main
+
+import (
+	"bytes"
+	"os"
+	"path/filepath"
+	"strings"
+	"testing"
+)
+
+func TestParseCoresHubPricingCatalogBuildsRecords(t *testing.T) {
+	raw, err := os.ReadFile(filepath.Join("testdata", "coreshub_pricing_sample.txt"))
+	if err != nil {
+		t.Fatalf("读取 fixture 失败: %v", err)
+	}
+
+	records, err := parseCoresHubPricingCatalog(string(raw))
+	if err != nil {
+		t.Fatalf("parseCoresHubPricingCatalog 返回错误: %v", err)
+	}
+	if len(records) != 8 {
+		t.Fatalf("期望 8 条 CoresHub 价格记录，实际 %d", len(records))
+	}
+	if records[0].ModelID != "coreshub-deepseek-r1-distill-qwen-1-5b" {
+		t.Fatalf("首条 modelID 错误: %q", records[0].ModelID)
+	}
+	if !records[0].IsFree || records[0].InputPrice != 0 || records[0].OutputPrice != 0 {
+		t.Fatalf("免费模型解析错误: %+v", records[0])
+	}
+	if records[3].InputPrice != 0.2 || records[3].OutputPrice != 0.2 {
+		t.Fatalf("千 token 单价换算错误: %+v", records[3])
+	}
+	if records[6].InputPrice != 2 || records[6].OutputPrice != 8 {
+		t.Fatalf("DeepSeek-V3 价格错误: %+v", records[6])
+	}
+	if records[7].InputPrice != 4 || records[7].OutputPrice != 16 {
+		t.Fatalf("DeepSeek-R1 价格错误: %+v", records[7])
+	}
+}
+
+func TestRunCoresHubPricingImportDryRunPrintsSummary(t *testing.T) {
+	var out bytes.Buffer
+	err := runCoresHubPricingImport(coreshubPricingImportConfig{
+		URL:     defaultCoresHubPricingURL,
+		Fixture: filepath.Join("testdata", "coreshub_pricing_sample.txt"),
+		DryRun:  true,
+	}, nil, &out)
+	if err != nil {
+		t.Fatalf("runCoresHubPricingImport 返回错误: %v", err)
+	}
+	output := out.String()
+	for _, want := range []string{
+		"source=coreshub-pricing-import",
+		"models=8",
+		"operator=CoresHub",
+		"dry_run=true",
+	} {
+		if !strings.Contains(output, want) {
+			t.Fatalf("输出缺少 %q，实际: %q", want, output)
+		}
+	}
+}