refactor: use spread metrics for content data fields

tests/csv-exporter.test.ts

@@ -196,8 +196,8 @@ describe("csv-exporter", () => {
         authorId: "123",
         authorName: "Alice",
         spreadMetrics: {
-          "个人视频_近30天_完播率": "28.24%",
-          "只看指派_排除营销流量_星图视频_近30天_互动率": "4.02%"
+          "内容数据-个人视频-近30天-完播率": "28.24%",
+          "内容数据-只看指派-排除营销流量-星图视频-近30天-互动率": "4.02%"
         },
         status: "success"
       } satisfies MarketRecord
@@ -207,12 +207,12 @@ describe("csv-exporter", () => {
     expect(headerLine).toContain(
       [
         "秒思api-cp_search",
-        "个人视频_近30天_完播率",
-        "个人视频_近30天_播放量中位数"
+        "内容数据-个人视频-近30天-完播率",
+        "内容数据-个人视频-近30天-播放量中位数"
       ].join(",")
     );
     expect(headerLine).toContain(
-      "只看指派_排除营销流量_星图视频_近30天_互动率"
+      "内容数据-只看指派-排除营销流量-星图视频-近30天-互动率"
     );
     expect(rowLine).toContain("28.24%");
     expect(rowLine).toContain("4.02%");