Summarize outcome of post release action

The logs give a detailed account of what the action did. It would be nice to also have a summary, perhaps with links to the GitHub release and Bluesky post.

Start by locating the post-release action that currently emits the detailed logs and review how its outcome is reported. Done means the action provides a concise summary that includes links to the relevant GitHub release and Bluesky post.

Written by the indexing model from the issue text.