Write changelog entries from these commits

Cutting a release and the commit log is not a changelog.

Turn the commits below into a changelog entry written for users, not contributors.

Group under: Breaking changes, Added, Changed, Fixed, Deprecated, Security. Omit any empty group.

Rules:
- Each line describes the effect on the user, not the implementation. If a commit changes nothing a user can observe, leave it out.
- Breaking changes come first, and each states what breaks, who is affected, and the migration in one line.
- For fixes, describe the symptom the user saw, not the internal cause.
- No commit hashes in the prose. Link issue numbers at the end of the line if I supply them.
- Merge multiple commits that produced one user-visible change into a single entry.

List separately any commit you could not classify, so I can check whether it needed an entry.

Version:
Commits:

Releases and decisions. Changelogs, migration guides and decision records that explain what changed and why.