Add MsnProvider implementing MarketDataProvider trait with quote,
fundamentals, and history support. Includes provider-aware config
(file/env/CLI), cache namespace isolation per provider, symbol ID
mapping via embedded TSV, OHLCV resampling, and comprehensive unit
+ integration tests with MSN fixture data.
Key changes:
- MsnProvider with quote, key-ratios, and chart endpoints
- ProviderKind enum (yahoo/msn) with config hierarchy support
- Provider-namespaced cache buckets to prevent cross-provider poisoning
- Provider-aware MockProvider loading correct fixtures per provider
- Integration tests for config round-trip and cache isolation
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
- Use curl_chrome131 (and fallback chain) instead of 'curl-impersonate --impersonate'
The curl-impersonate-chrome package ships per-version binaries, not a generic binary
- Add Unknown(serde_json::Value) catch-all variant to QuoteSummaryValue
Yahoo returns {} for empty fields and null/strings that broke deserialization
- Keep cookie jar flow: fc.yahoo.com (404 but writes A3 cookie) + getcrumb + quoteSummary
- Pass cookie header from jar to quoteSummary request via ureq
Live result: stocks fundamental/growth/valuation/risk/compare now working
BBCA: ROE 21.14% excellent, Net Margin 53.28% excellent, Growth mixed
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
