feat: KOC 资源导入后自动爬取主页资料并调用 LLM 打标签

- 新增 structured_text_process 打标客户端（文本构造、标签解析清洗、MCP 调用）
- 写库后后台打标（tagUntaggedAccounts），单条新增 / 批量导入 / 每日补全三个入口统一
- 标签只补空，UPDATE 带 tags 为空守卫，不覆盖已有标签
- 新增 AI_TAGGING_TOOL 配置项（留空关闭），更新配置示例与文档
- 新增 16 个打标测试用例，全量 131 个测试通过

app/api/resources-insert/route.ts

@@ -1,9 +1,11 @@
 import { isManagerRequest, managerForbidden } from "../../../lib/user-auth";
+import { runInBackground } from "../../../lib/background";
 import { buildManualRow, type ManualResourceInput } from "../../../lib/resource-import";
 import {
   analyzeRows,
   enrichRows,
   loadAccounts,
+  tagUntaggedAccounts,
   writeAnalyzedRows,
 } from "../../../lib/resource-write";
 
@@ -48,6 +50,10 @@ export async function POST(request: Request) {
       );
     }
     await writeAnalyzedRows(analyzed);
+    runInBackground(
+      tagUntaggedAccounts(analyzed),
+      "resource account tagging",
+    );
     const result = analyzed[0];
     const outcome: InsertResult = {
       action: result.action === "update" ? "update" : "create",