release: verify_index_release.sh and 0.2.3 changelog

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

CHANGELOG.md

@@ -1,6 +1,21 @@
 # Changelog
 
-## [0.2.2] (2020-07-19)
+## [0.2.3]
+
+Hotfix. In 0.2.2, `import app_skellington` raised
+`ImportError: cannot import name 'NoCommandSpecified' from partially initialized module`
+(a circular import) for every install.
+
+ * Fix the circular import between `cli` and `app_container`. The framework
+   exceptions now live in `_util`, and the public names are unchanged.
+ * Tested on Linux, CPython 3.8–3.14 (Gitea CI). Each version builds the wheel
+   and sdist, installs them and smoke-tests the import.
+ * Tooling: ruff replaces black/isort/flake8; uv with a committed lockfile.
+ * Metadata: license classifier corrected to MIT-0; Python version classifiers
+   added; "OS Independent" replaced by Linux (Windows and macOS untested).
+ * README: the debug variable is `APPSKELLINGTON_DEBUG`.
+
+## [0.2.2] (2024-11-17)
 
 Second release is focused on cleanup, documentation.