Add `// Copyright Sunbeam Studios 2026` and `// SPDX-License-Identifier:
Apache-2.0` headers to all source files missing them. Update LICENSE
copyright year, Dockerfile copyright header, and .dockerignore for new
project structure (lean4/, docs/, training artifacts).
Signed-off-by: Sienna Meridian Satterwhite <sienna@sunbeam.pt>
Behind the `training` feature flag (burn 0.20 + ndarray + autodiff).
Trains a single-hidden-layer MLP with Adam optimizer and weighted BCE
loss, plus a CART decision tree using Gini impurity. Exports trained
weights as Rust const arrays that compile directly into the binary.
Signed-off-by: Sienna Meridian Satterwhite <sienna@sunbeam.pt>