WoeBoost Version 1.2.0

• Parallel by default: features are binned and transformed on a ThreadPoolExecutor without any configuration (n_tasks=1 restores sequential processing).
• Faster binning: bin statistics are computed in a single pass (searchsorted + bincount) instead of one mask per bin; fitted bins are unchanged.
• Feature binning now also runs in parallel (previously only transform did, and only with an explicit executor_cls).
• n_tasks=None is resolved at fit/transform time from the number of features instead of in __init__.
• Free-threading detection uses sys._is_gil_enabled(), so it reports the runtime GIL state.
• Build backend switched to hatchling (previously no [build-system] was declared, so builds fell back to legacy setuptools).
• Removed requirements.txt (dependencies are managed in pyproject.toml / uv.lock).
• Moved pydocstyle from runtime to dev dependencies.
• Removed the freethreaded extra: it only repeated the base dependencies, and free-threaded Python needs no extra packages.
• Free-threaded CI now runs the test suite on Python 3.13t with the GIL disabled.