feat: 接入同花顺官方SDK，新增v2数据接口，股票详情K线改用v2(前复权日K)

- vendor 同花顺官方 SDK 到 backend/sdk（含K线>10年自动切片、重试、拼音首字母检索兜底）
- 新增 /api/v2 路由：行情/估值/财务/日历/指数/K线/标的检索
- 股票详情页K线改用 v2 同花顺接口（前复权日K+总手+按昨收涨跌幅）
- 密钥仅后端持有，响应/日志无泄露
- 新增 run_local.sh 本地直接拉起（不再依赖 docker）

src/routes/stock.$code.tsx

@@ -1,7 +1,8 @@
 import { createFileRoute } from "@tanstack/react-router";
 import { useState, useEffect, useMemo, Fragment } from "react";
 import { collectionsApi } from "@/lib/api-client";
-import { fetchStockQuote, fetchStockHistory, fetchStockFundFlow, fetchCompanyProfile, fetchBusinessSegments, fetchFinancialData, getStockBoard, type StockQuote, type KLineData, type FundFlowData, type FundFlowSummary, type CompanyProfile, type BusinessSegmentsResponse, type FinancialDataResponse } from "@/lib/stock-api";
+import { fetchStockQuote, fetchStockFundFlow, fetchCompanyProfile, fetchBusinessSegments, fetchFinancialData, getStockBoard, type StockQuote, type KLineData, type FundFlowData, type FundFlowSummary, type CompanyProfile, type BusinessSegmentsResponse, type FinancialDataResponse } from "@/lib/stock-api";
+import { fetchStockHistoryV2 } from "@/lib/fuyao-api";
 import StockProfileTabs from "@/components/stock-profile-tabs";
 import { getUserId } from "@/lib/user-id";
 import { formatMoney } from "@/lib/utils";
@@ -182,7 +183,7 @@ function StockDetail() {
       setFundFlowLoading(true);
 
       const [historyResult, fundFlowResult] = await Promise.allSettled([
-        fetchStockHistory(code, chartDays),
+        fetchStockHistoryV2(code, chartDays),
         fetchStockFundFlow(code, quote.name, 21),
       ]);