Added

• 19 new APIs: FundamentalContext +9, QuoteContext +1 (short_trades), MarketContext +3, new ScreenerContext +5 — see PR #526, #527
• Rust: OAuthBuilder gains TokenStorage trait for custom token persistence

Changed

• short_positions unified for HK+US; typed structs with RFC 3339 timestamps
• top_movers, rank_list, valuation_comparison: typed structs, counter_id → symbol, RFC 3339 timestamps

Breaking changes

• stock_events → top_movers; StockEventsResponse → TopMoversResponse
• hk_short_positions removed; use short_positions(symbol, count)
• ShortPositionsResponse, ShortTradesResponse, TopMoversResponse, RankListResponse, ValuationComparisonResponse changed from raw JSON to typed structs