v0.4.0

Fixed

• WARP_DB worker datadir teardown races (Dirs::delete + recycle/shutdown):
  under parallel Pest with WARP_MODE + WARP_DB, InnoDB temp files
  (#ib_redo*_tmp and similar) could disappear or reappear mid-walk during
  worker datadir cleanup, so bare unlink/rmdir in Dirs.php became
  Laravel testing ErrorExceptions on otherwise green bystander tests.
  Dirs::delete is now race-safe (ENOENT ignored mid-walk; bounded retry on
  "directory not empty"; non-ENOENT failures still surface). After
  mysqld stop in recycle()/shutdown(), a short settle runs before
  datadir delete so the tree is quieter before cleanup.

Changed

• Release process is now scripted: scripts/release.sh (and
  composer release / composer release:dry) runs CHANGELOG + quality gates,
  creates an annotated semver tag, and pushes tag only for Packagist.
  See docs/RELEASES.md and the project /release skill.