v1.0.1

Added

• A tag-release CI job (.github/workflows/ci.yml) that auto-tags and
  publishes a GitHub Release whenever pyproject.toml's version is
  bumped on main and the four gates pass — release notes are pulled
  verbatim from this file's matching ## X.Y.Z - YYYY-MM-DD section.
  Idempotent (skips if that version's tag already exists), so it's safe
  to run on every push regardless of whether that push touched the
  version. Replaces manual tagging going forward.