Yahoo Finance blocks standard ureq/rustls via TLS fingerprinting (JA3/JA4).
Reverse-engineered from yfinance source: they use curl_cffi with Chrome impersonation.
Fix:
- Fetch cookie via curl-impersonate from fc.yahoo.com
- Fetch crumb via curl-impersonate from query1.finance.yahoo.com/v1/test/getcrumb
(correct URL: getcrumb, not getCrumb or csrfToken)
- Parse Netscape cookie jar format, send cookies as header to quoteSummary
- 401 retry: clear crumb + cookie jar, re-auth on next attempt
- Crumb validation: reject HTML, empty, rate-limit responses
- Add curl-impersonate-chrome to flake.nix devShell
- Add analysis module: SMA, EMA, RSI(14), MACD(12,26,9), volume ratio
- Add signal interpretation: bullish/bearish/neutral with consensus voting
- Wire up 'stocks technical <SYMBOL>' CLI subcommand
- Table output with colored signals + JSON output support
- Cache/offline/stale-cache fallback (same pattern as quote/history)
- Fetch 1 year of daily data for SMA200 coverage (~250 trading days)
- Add TechnicalReport, MacdSnapshot, VolumeSnapshot structs
- Add 4 new unit tests + 3 integration tests (30 total passing)