3.0.1

OilPVT auto-harmonization — rsb is now optional; provide degf to resolve consistent Pb, Rsb, and viscosity scaling from a single constructor call. Rate functions (oil_rate_radial/linear, gas_rate_radial/linear) now accept PVT objects directly, eliminating manual property lookups. New Completion.geometry_at_md() and profile() methods. oil_harmonize() adds vis_frac viscosity tuning. make_bot_og() supports vis_frac scaling. Module-level all exports and docstrings for improved discoverability.