hyperopt-samplers

Pluggable Sampler implementations for hyperopt-rs. All three are interchangeable through the same Study API:

• [RandomSampler] — independent random draws; the baseline.
• [GridSampler] — exhaustive enumeration over a caller-provided grid.
• [TpeSampler] — adaptive Tree-structured Parzen Estimator, wrapping the tpe crate.
• [CmaEsSampler] — Covariance Matrix Adaptation Evolution Strategy for continuous spaces, implemented from scratch.