Automatic pruning manager
CurationManager( database: TrajectoryDatabase, threshold: float = 0.3, min_retrievals: int = 5, curate_every: int = 10, )
maybe_curate() -> bool curate() -> list[str] get_utility_scores() -> dict[str, float] get_low_utility_trajectories() -> list[str]
maybe_curate()
curate_every