fix: add Yahoo crumb auth for v10/quoteSummary company info

fix: v10/quoteSummary for company info + price-based factor proxies

fix: company info from chart API meta, multi-market sentiment, factor analysis

fix: eliminate all remaining yfinance/XGBoost/calendar errors on cloud

fix: remove yfinance fallbacks on cloud to eliminate 429 error logs

fix: bypass yfinance HTTP, use curl_cffi direct Yahoo API for cloud

fix: use curl_cffi for cookie acquisition only, pass cookies to requests.Session

fix: use curl_cffi for Chrome TLS fingerprint impersonation on cloud

fix: add browser session headers to yfinance for cloud IP compatibility

fix: single worker + graceful table creation for Neon

fix: remove unused imports causing tsc -b build errors

fix: remove COPY .env.production (secrets come from HF env vars)

QuantHedge: Full deployment with Docker + nginx + uvicorn