Optimize APK update checks and CI builds

README.md

@@ -92,7 +92,7 @@ apk:lint-shell        Run ShellCheck for packaging automation
 apk:packages          List built Alpine packages and dependencies
 apk:publish-check     Run lint, multi-arch build, package listing, and smoke test
 apk:publish-gitea     Publish built packages to the Gitea Alpine package registry
-apk:outdated          Check packaged upstream versions against latest GitHub releases
+apk:outdated          Check packaged upstream versions and release summaries
 apk:shell             Open an Alpine package build shell in Docker
 apk:smoke             Install-test built packages from the local repository in Docker
 apk:test-install      Test README installation instructions in a fresh Alpine container
@@ -231,10 +231,15 @@ versions fail the command:
 APK_UPDATE_CHECK_MODE=fail mise run apk:outdated
 ```
 
+When an update is available, the command also lists compact release-note
+summaries for every release between the packaged and latest versions.
+
 ### Gitea Workflow
 
 `.gitea/workflows/build.yml` builds and publishes `v3.24`. Pull requests
-build only.
+build only. CI compares source package versions with the published registry,
+then rebuilds only changed or unpublished packages; local build commands keep
+using their local caches.
 
 Repository variables: