feat: add niuone US market + X timeline sources on HF tip

Add direct EastMoney daily and board flow fallbacks

Add ETF premium and HK short selling sources

Add fleur-derived data endpoints and source fallbacks

refactor: swap chip endpoints — CYQ precise becomes /chip default

feat: add chip-cyq endpoint (precise chip distribution via CYQ algorithm)

feat: add income, balancesheet, daily-basic endpoints

feat: add AI-Search-Hub multi-platform search integration

chore: trigger HF rebuild

docs: README 补充财务接口 EM 指标源

Update README with new Shenwan industry and fund endpoints

Update README with new margin, northbound, shareholder endpoints

Apply fixes: search SSE streaming, fund-flow fallback, default search config