message: Add a `CHANGELOG.md` for tracing log changes
diff: @@ -15,6 +15,7 @@ All notable changes to this project will be documented in this file. The format
  ### Changed
  * Support building and testing using stable Rust.
  +* Log chattiness in `debug` or lower levels has been reduced and performance at `info` or higher slightly improved.
  ### Removed
  * The unofficial support for nix-related derivations and support tooling has been removed.
  