maxilirator

Qlib’s region system parameterized

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### 🌟 Feature Description Make qlib’s region system fully parameterized so users can register and switch to non-us/cn markets (e.g., Nordics) without modifying core code. Region metadata (calendars, instruments, feature...

FileFeatureStorage lowercases the instrument directory name when building feature paths

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FileFeatureStorage lowercases the instrument directory name when building feature paths (instrument.lower()/field.lower().freq.bin). On case‑sensitive filesystems (e.g., Linux) where the vendor data is stored with uppercase instrument folders (data/xsto/features/ABB-U/...), the loader looks...

Backtest/joblib worker crash: AttributeError: No such registered in self._config

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## 🐛 Bug Description During backtests that spawn joblib workers, fresh worker processes import Qlib and call config.register_from_C(g_config). That function checks C.registered before copying g_config. Because worker C._config lacks the...