fractal-layer-0.1.0.0: CHANGELOG.md

# Changelog

## 0.1.0.0 — 2026-03-18

* Initial release.
* Core `Layer` type with `Monad`, `Arrow`, `Category`, `ArrowChoice`,
  `Profunctor`, `Traversing`, `Alternative`, and `Selective` instances.
* Three construction primitives: `effect`, `resource`, `bracketed`.
* `Service` for singleton caching with thread-safe initialisation.
* `LayerInterceptor` for observability hooks.
* `Fractal.Layer.Diagnostics` for tree-structured initialisation tracing.