- Detect yfinance quote_type (CURRENCY→forex, FUTURE→energy, INDEX→indices,
ETF→etfs, EQUITY→equities) when adding a custom ticker and persist it in
market_watchlist.asset_class
- get_all_quotes() merges custom tickers into their proper group (e.g. EURUSD=X
appears under Forex) instead of always under a separate "Custom" group
- "Custom" tab only shows tickers whose type couldn't be detected
- Add market_watchlist.asset_class migration; ensure backtest_lab_runs and
market_watchlist are always created at init_db() time
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>